roblox-animation-vfx

name	roblox-animation-vfx
description	Animations, particles, tweens, ContentProvider, visual effects.
last_reviewed	"2026-05-25T00:00:00.000Z"

Animation & VFX Reference

Overview

Load this reference when working on:

• Character or NPC animations (idle, walk, attack, emotes)
• Particle effects (fire, smoke, sparkles, magic, weather)
• Beams and trails (lasers, sword swings, magic projectiles)
• TweenService-driven visual feedback (hit flashes, pulses, transitions)
• Lighting and post-processing (mood, atmosphere, glow)
• Sound design and positional audio
• Camera effects (shake, zoom, cutscenes)
• General visual polish and juice

---

Quick Reference

Load Full Reference below only when you need specific property values, recipes, or implementation details.

Key rules:

• Animations need uploaded AnimationIds (rbxassetid://). Never invent IDs.
• Priority order: Core < Idle < Movement < Action. Higher priority overrides lower on same track.
• Always use Animator (on Humanoid/AnimationController), not deprecated Humanoid:LoadAnimation()
• MarkerReachedSignal for syncing sounds/VFX to animation frames
• ParticleEmitter: Rate=0 + Emit(count) for burst effects. Enabled=false to stop new particles.
• Beams need Attachment0 + Attachment1. Trails need one Attachment.
• Highlight: parent to target or set Adornee. Max 255 per client. AlwaysOnTop to see through geometry.
• TweenService: create TweenInfo once, reuse. Chain with Completed event, don't nest.
• Post-processing: keep subtle. Bloom + ColorCorrection + DepthOfField cover most moods.
• Clean up: Destroy() particles/beams when done. Use Trove for lifecycle.

---

Full Reference

Character Animation

Animator Service on Humanoid

Every Humanoid has (or should have) an Animator child. The Animator is the engine that plays, blends, and prioritizes animation tracks on a character rig.

local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local animator = humanoid:FindFirstChildOfClass("Animator")
    or humanoid:WaitForChild("Animator")

Loading and Playing Animations

-- 1. Create an Animation instance with the asset ID
local slashAnim = Instance.new("Animation")
slashAnim.AnimationId = "rbxassetid://123456789"

-- 2. Load it through the Animator (returns an AnimationTrack)
local slashTrack = animator:LoadAnimation(slashAnim)

-- 3. Play / Stop
slashTrack:Play()
-- Optional fade time and weight
slashTrack:Play(0.2)          -- 0.2s fade-in
slashTrack:Stop(0.3)          -- 0.3s fade-out

-- 4. Adjust speed at runtime
slashTrack:AdjustSpeed(1.5)   -- 1.5x playback
slashTrack:AdjustWeight(0.8)  -- 80% blend weight

Animation Priorities

Priorities determine which animation wins when multiple tracks affect the same joints. Higher priority overrides lower.

Priority	Use Case
Enum.AnimationPriority.Idle	Breathing, idle sway
Enum.AnimationPriority.Movement	Walk, run, jump, fall
Enum.AnimationPriority.Action	Attack, interact, emote
Enum.AnimationPriority.Action2	Higher-priority actions
Enum.AnimationPriority.Action3	Even higher-priority actions
Enum.AnimationPriority.Action4	Highest action tier
Enum.AnimationPriority.Core	Internal Roblox (avoid overriding)

slashTrack.Priority = Enum.AnimationPriority.Action

MarkerReachedSignal

Animation events let you fire logic at exact frames inside an animation (set markers in the Animation Editor).

slashTrack:GetMarkerReachedSignal("HitFrame"):Connect(function(paramValue: string)
    -- Spawn hitbox, play sound, emit particles, etc.
    print("Hit frame reached!", paramValue)
end)

Blending Between Animations

Roblox automatically blends overlapping tracks based on priority and weight. To cross-fade manually:

local walkTrack = animator:LoadAnimation(walkAnim)
local runTrack  = animator:LoadAnimation(runAnim)

walkTrack:Play(0.2)

-- Later, cross-fade to run
walkTrack:Stop(0.3)
runTrack:Play(0.3)

For partial-body layering (e.g., upper body attack while legs run), set different priorities and ensure the lower-priority animation only drives lower body joints.

---

AnimationController

Use AnimationController for anything that is NOT a Humanoid -- props, doors, creatures with custom rigs, cutscene actors, etc.

local model = workspace.DragonNPC
local animController = Instance.new("AnimationController")
animController.Parent = model

local flyAnim = Instance.new("Animation")
flyAnim.AnimationId = "rbxassetid://987654321"

local flyTrack = animController:LoadAnimation(flyAnim)
flyTrack.Looped = true
flyTrack:Play()

Custom Rigs

• The model needs Motor6D joints connecting its parts, just like a character rig.
• Root part should be the PrimaryPart of the model.
• Animations are authored in the Animation Editor against this rig, then exported.

Attaching to Models

-- Typical setup for an animated NPC without Humanoid
local npc = Instance.new("Model")
npc.Name = "CrystalGolem"

local rootPart = Instance.new("Part")
rootPart.Name = "HumanoidRootPart" -- convention for animation rigs
rootPart.Anchored = false
rootPart.Parent = npc
npc.PrimaryPart = rootPart

local animController = Instance.new("AnimationController")
animController.Parent = npc

-- Add Motor6D joints, mesh parts, then load animations

---

Particle Effects

ParticleEmitter Core Properties

Property	Type	Description
Rate	number	Particles emitted per second (0 = manual Emit())
Lifetime	NumberRange	How long each particle lives (seconds)
Speed	NumberRange	Initial velocity (studs/second)
SpreadAngle	Vector2	Cone spread in X and Y (degrees)
Size	NumberSequence	Size over particle lifetime
Color	ColorSequence	Color over particle lifetime
Transparency	NumberSequence	Transparency over particle lifetime
Texture	string	Decal/image asset ID for particle appearance
RotSpeed	NumberRange	Rotation speed (degrees/second)
Acceleration	Vector3	Constant force (gravity = Vector3.new(0,-10,0))
Drag	number	Air resistance (0 = none, higher = more drag)
LightEmission	number	0-1, additive blending (1 = fully additive/glowy)
LightInfluence	number	0-1, how much scene lighting affects particles
ZOffset	number	Render order offset toward/away from camera
Orientation	Enum.ParticleOrientation	FacingCamera, VelocityParallel, etc.

NumberSequence and ColorSequence

-- Size: start at 1, peak at 2 at midlife, shrink to 0
local sizeSeq = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 1),
    NumberSequenceKeypoint.new(0.5, 2),
    NumberSequenceKeypoint.new(1, 0),
})

-- Color: orange to red
local colorSeq = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 170, 0)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(200, 30, 0)),
})

-- Transparency: fade in then fade out
local transSeq = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 1),
    NumberSequenceKeypoint.new(0.1, 0),
    NumberSequenceKeypoint.new(0.8, 0),
    NumberSequenceKeypoint.new(1, 1),
})

Common Effect Recipes

Fire

local fire = Instance.new("ParticleEmitter")
fire.Rate = 80
fire.Lifetime = NumberRange.new(0.4, 0.8)
fire.Speed = NumberRange.new(3, 6)
fire.SpreadAngle = Vector2.new(15, 15)
fire.Size = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0.5),
    NumberSequenceKeypoint.new(0.3, 1.5),
    NumberSequenceKeypoint.new(1, 0),
})
fire.Color = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 220, 50)),
    ColorSequenceKeypoint.new(0.4, Color3.fromRGB(255, 100, 0)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(100, 20, 0)),
})
fire.Transparency = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0.3),
    NumberSequenceKeypoint.new(1, 1),
})
fire.LightEmission = 1
fire.Acceleration = Vector3.new(0, 4, 0)
fire.Texture = "rbxasset://textures/particles/fire_main.dds"
fire.Parent = somePart

Smoke

local smoke = Instance.new("ParticleEmitter")
smoke.Rate = 30
smoke.Lifetime = NumberRange.new(2, 4)
smoke.Speed = NumberRange.new(1, 3)
smoke.SpreadAngle = Vector2.new(30, 30)
smoke.Size = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 1),
    NumberSequenceKeypoint.new(1, 5),
})
smoke.Color = ColorSequence.new(Color3.fromRGB(120, 120, 120))
smoke.Transparency = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0.5),
    NumberSequenceKeypoint.new(1, 1),
})
smoke.RotSpeed = NumberRange.new(-30, 30)
smoke.Acceleration = Vector3.new(0, 2, 0)
smoke.LightInfluence = 1
smoke.Parent = somePart

Sparkles / Magic Particles

local sparkle = Instance.new("ParticleEmitter")
sparkle.Rate = 40
sparkle.Lifetime = NumberRange.new(0.5, 1.2)
sparkle.Speed = NumberRange.new(2, 5)
sparkle.SpreadAngle = Vector2.new(180, 180)
sparkle.Size = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0.3),
    NumberSequenceKeypoint.new(0.5, 0.6),
    NumberSequenceKeypoint.new(1, 0),
})
sparkle.Color = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(200, 200, 255)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(100, 100, 255)),
})
sparkle.LightEmission = 1
sparkle.Texture = "rbxasset://textures/particles/sparkles_main.dds"
sparkle.Parent = somePart

Rain

local rain = Instance.new("ParticleEmitter")
rain.Rate = 300
rain.Lifetime = NumberRange.new(0.8, 1.2)
rain.Speed = NumberRange.new(40, 60)
rain.SpreadAngle = Vector2.new(5, 5)
rain.Size = NumberSequence.new(0.05)
rain.Color = ColorSequence.new(Color3.fromRGB(180, 200, 220))
rain.Transparency = NumberSequence.new(0.4)
rain.Acceleration = Vector3.new(0, -80, 0)
rain.Drag = 0
rain.Orientation = Enum.ParticleOrientation.VelocityParallel
rain.Parent = largeCoverPart -- position above the play area

Snow

local snow = Instance.new("ParticleEmitter")
snow.Rate = 100
snow.Lifetime = NumberRange.new(4, 7)
snow.Speed = NumberRange.new(1, 3)
snow.SpreadAngle = Vector2.new(60, 60)
snow.Size = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0.1),
    NumberSequenceKeypoint.new(1, 0.15),
})
snow.Color = ColorSequence.new(Color3.new(1, 1, 1))
snow.Transparency = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0),
    NumberSequenceKeypoint.new(0.8, 0),
    NumberSequenceKeypoint.new(1, 1),
})
snow.Acceleration = Vector3.new(0, -2, 0)
snow.RotSpeed = NumberRange.new(-60, 60)
snow.Drag = 3
snow.Parent = largeCoverPart

Magic Aura (orbiting particles)

local aura = Instance.new("ParticleEmitter")
aura.Rate = 25
aura.Lifetime = NumberRange.new(1, 2)
aura.Speed = NumberRange.new(0.5, 1.5)
aura.SpreadAngle = Vector2.new(180, 180)
aura.Size = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0),
    NumberSequenceKeypoint.new(0.3, 0.8),
    NumberSequenceKeypoint.new(1, 0),
})
aura.Color = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(100, 0, 255)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(200, 50, 255)),
})
aura.Transparency = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 1),
    NumberSequenceKeypoint.new(0.2, 0.2),
    NumberSequenceKeypoint.new(1, 1),
})
aura.LightEmission = 1
aura.RotSpeed = NumberRange.new(-90, 90)
aura.Drag = 5
aura.Parent = character.HumanoidRootPart

---

Beam and Trail

Beam

A Beam renders a textured ribbon between two Attachment instances. Perfect for lasers, lightning, tethers, and energy connections.

-- Setup: two parts with attachments
local att0 = Instance.new("Attachment")
att0.Parent = partA

local att1 = Instance.new("Attachment")
att1.Parent = partB

local beam = Instance.new("Beam")
beam.Attachment0 = att0
beam.Attachment1 = att1
beam.Width0 = 0.5
beam.Width1 = 0.5
beam.Color = ColorSequence.new(Color3.fromRGB(0, 150, 255))
beam.Transparency = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0),
    NumberSequenceKeypoint.new(1, 0.5),
})
beam.LightEmission = 1
beam.FaceCamera = true
beam.Segments = 20         -- more segments = smoother curves
beam.CurveSize0 = 2       -- bend near Attachment0
beam.CurveSize1 = -2      -- bend near Attachment1
beam.TextureLength = 1
beam.TextureSpeed = 1      -- scrolling texture
beam.Texture = "rbxassetid://123456789"
beam.Parent = partA

Key Beam Properties

Property	Description
Attachment0/1	Start and end points
Width0/1	Width at each attachment (studs)
Color	ColorSequence along the beam length
Transparency	NumberSequence along the beam length
CurveSize0/1	Bezier curve magnitude at each end
Segments	Number of straight segments (more = smoother curves)
FaceCamera	Always faces the camera for billboard effect
TextureSpeed	Scrolls the texture along the beam
LightEmission	Additive blending for glow

Trail

A Trail renders a ribbon behind a moving part. Requires two Attachment instances on the same part (defining the trail's width axis).

local part = workspace.Sword.Blade

local att0 = Instance.new("Attachment")
att0.Position = Vector3.new(0, 0, -2)  -- base of blade
att0.Parent = part

local att1 = Instance.new("Attachment")
att1.Position = Vector3.new(0, 0, 2)   -- tip of blade
att1.Parent = part

local trail = Instance.new("Trail")
trail.Attachment0 = att0
trail.Attachment1 = att1
trail.Lifetime = 0.3                   -- how long segments persist
trail.MinLength = 0.05                 -- minimum distance before new segment
trail.FaceCamera = true
trail.Color = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 255, 255)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(100, 100, 255)),
})
trail.Transparency = NumberSequence.new({
    NumberSequenceKeypoint.new(0, 0),
    NumberSequenceKeypoint.new(1, 1),
})
trail.LightEmission = 0.8
trail.WidthScale = NumberSequence.new(1)
trail.Parent = part

Common Uses

• Laser beams: Beam between gun barrel attachment and hit-point attachment.
• Sword trails: Trail on blade with short Lifetime (0.2-0.4s).
• Magic effects: Beam with high CurveSize values and scrolling texture for arcane tethers.
• Lightning: Beam with many Segments, rapidly randomizing CurveSize0/1 each frame.

---

Parent Destruction Behavior

When a Part or Model containing effects is destroyed (:Destroy(), player leave, workspace clear), all child ParticleEmitter, Trail, Beam, and Attachment are destroyed instantly. Active particles vanish mid-flight, trails cut off, beams disappear.

Solution - Debris + temporary holder: If you need an effect to finish gracefully after its parent is gone, reparent it to a temporary part and let Debris clean up.

local Debris = game:GetService("Debris")

local function destroyWithGrace(effect: Instance, parent: Instance, gracePeriod: number)
    -- Create a temporary invisible holder
    local holder = Instance.new("Part")
    holder.Anchored = true
    holder.CanCollide = false
    holder.Transparency = 1
    holder.Size = Vector3.one
    holder.Parent = workspace

    -- Reparent the effect so it survives the original parent
    effect.Parent = holder

    -- Destroy the original parent (effect is now safe)
    parent:Destroy()

    -- Debris cleans up the holder + effect after the grace period
    Debris:AddItem(holder, gracePeriod)
end

-- Example: Trail with 1s lifetime - give it 1.1s to fade out cleanly
local trail = -- ... setup trail on a sword part ...
destroyWithGrace(trail, swordPart, 1.1)

For Trail specifically, set Debris:AddItem(holder, trail.Lifetime + 0.1) so the trail's existing segments finish rendering before cleanup.

---

Highlight

A Highlight instance draws a colored outline around a BasePart or Model to call attention to it. Every highlight has two layers: an outline (silhouette edge) and an interior (overlay fill), each independently customizable.

Basic Usage

local highlight = Instance.new("Highlight")
highlight.Adornee = targetPart
highlight.FillColor = Color3.fromRGB(255, 50, 50)
highlight.FillTransparency = 0.3
highlight.OutlineColor = Color3.new(1, 1, 1)
highlight.Parent = targetPart

Properties

Property	Type	Default	Description
Adornee	Instance	-	The BasePart or Model to highlight
DepthMode	Enum.HighlightDepthMode	AlwaysOnTop	AlwaysOnTop = visible through objects, Occluded = hidden by obstructions
Enabled	boolean	true	Toggle visibility
FillColor	Color3	[255, 200, 50]	Interior overlay color
FillTransparency	number	0.5	0 = opaque, 1 = invisible
OutlineColor	Color3	[255, 255, 255]	Edge outline color
OutlineTransparency	number	0	0 = opaque, 1 = invisible

Common Pattern - Team Highlight

local function addTeamHighlight(character: Model, teamColor: Color3)
    local hl = Instance.new("Highlight")
    hl.Adornee = character
    hl.FillColor = teamColor
    hl.FillTransparency = 0.6
    hl.OutlineColor = teamColor
    hl.DepthMode = Enum.HighlightDepthMode.AlwaysOnTop
    hl.Parent = character
end

Limitations

• Max 255 simultaneous Highlight instances per client. Excess instances are silently ignored.
• Disabled highlights still count toward the 255 limit - :Destroy() instead of Enabled = false if permanently unused.
• The Highlight itself is not destroyed when its Adornee is destroyed. Clean up manually.

Cleanup on Adornee Destroyed

local function attachHighlight(adornee: Instance): Highlight
    local hl = Instance.new("Highlight")
    hl.Adornee = adornee
    hl.Parent = adornee

    adornee.AncestryChanged:Connect(function()
        if not adornee:IsDescendantOf(game) then
            hl:Destroy()
        end
    end)
    return hl
end

---

TweenService for VFX

TweenService interpolates any numeric or color property over time. It is the backbone of procedural visual feedback.

TweenInfo

local TweenService = game:GetService("TweenService")

local info = TweenInfo.new(
    0.5,                             -- Duration (seconds)
    Enum.EasingStyle.Quad,           -- Easing style
    Enum.EasingDirection.Out,        -- Easing direction
    0,                               -- RepeatCount (0 = no repeat, -1 = infinite)
    false,                           -- Reverses (plays backward after forward)
    0                                -- DelayTime (seconds before starting)
)

Common Easing Styles

Style	Feel
Linear	Constant speed, mechanical
Quad	Gentle acceleration/deceleration
Cubic	Stronger ease
Quart	Even stronger
Sine	Smooth, organic
Back	Overshoots then settles
Bounce	Bounces at the end
Elastic	Springy overshoot
Exponential	Very sharp acceleration

Tweening Part Properties

-- Flash on hit: turn white then revert
local function flashPart(part: BasePart, originalColor: Color3)
    part.Color = Color3.new(1, 1, 1)  -- instant white
    local tweenBack = TweenService:Create(part, TweenInfo.new(0.3, Enum.EasingStyle.Quad), {
        Color = originalColor,
    })
    tweenBack:Play()
end

-- Pulse effect: scale up then back
local function pulse(part: BasePart)
    local originalSize = part.Size
    local tweenGrow = TweenService:Create(part, TweenInfo.new(0.15, Enum.EasingStyle.Back, Enum.EasingDirection.Out), {
        Size = originalSize * 1.3,
    })
    local tweenShrink = TweenService:Create(part, TweenInfo.new(0.2, Enum.EasingStyle.Quad, Enum.EasingDirection.In), {
        Size = originalSize,
    })
    tweenGrow:Play()
    tweenGrow.Completed:Connect(function()
        tweenShrink:Play()
    end)
end

-- Grow and fade out (explosion ring)
local function expandAndFade(part: BasePart)
    local tween = TweenService:Create(part, TweenInfo.new(0.6, Enum.EasingStyle.Quad, Enum.EasingDirection.Out), {
        Size = part.Size * 5,
        Transparency = 1,
    })
    tween:Play()
    tween.Completed:Connect(function()
        part:Destroy()
    end)
end

-- Color transition (damage indicator)
local function colorTransition(part: BasePart, targetColor: Color3, duration: number)
    local tween = TweenService:Create(part, TweenInfo.new(duration, Enum.EasingStyle.Sine), {
        Color = targetColor,
    })
    tween:Play()
end

Chaining Tweens

Use the Completed event to sequence tweens without coroutines:

local function chainedEffect(part: BasePart)
    local step1 = TweenService:Create(part, TweenInfo.new(0.2), { Transparency = 0.5 })
    local step2 = TweenService:Create(part, TweenInfo.new(0.3), { Size = part.Size * 2 })
    local step3 = TweenService:Create(part, TweenInfo.new(0.2), { Transparency = 1 })

    step1:Play()
    step1.Completed:Connect(function()
        step2:Play()
    end)
    step2.Completed:Connect(function()
        step3:Play()
    end)
    step3.Completed:Connect(function()
        part:Destroy()
    end)
end

---

Lighting Effects

Dynamic Lights

-- PointLight: omnidirectional, good for torches, explosions
local pointLight = Instance.new("PointLight")
pointLight.Brightness = 2
pointLight.Color = Color3.fromRGB(255, 180, 50)
pointLight.Range = 20
pointLight.Shadows = true
pointLight.Parent = torchPart

-- SpotLight: directional cone, good for flashlights, spotlights
local spotLight = Instance.new("SpotLight")
spotLight.Brightness = 3
spotLight.Color = Color3.new(1, 1, 1)
spotLight.Range = 40
spotLight.Angle = 30           -- cone half-angle in degrees
spotLight.Face = Enum.NormalId.Front
spotLight.Parent = flashlightPart

-- SurfaceLight: emits from a surface, good for screens, signs
local surfLight = Instance.new("SurfaceLight")
surfLight.Brightness = 1
surfLight.Color = Color3.fromRGB(0, 200, 255)
surfLight.Range = 10
surfLight.Face = Enum.NormalId.Front
surfLight.Parent = screenPart

Post-Processing Effects

All post-processing objects go in Lighting or Camera.

Atmosphere

local atmo = Instance.new("Atmosphere")
atmo.Density = 0.3           -- 0-1, how thick the atmosphere is
atmo.Offset = 0.25           -- shifts haze up/down
atmo.Color = Color3.fromRGB(200, 210, 230)  -- scatter color
atmo.Decay = Color3.fromRGB(120, 140, 170)  -- far-away color
atmo.Glare = 0.2             -- sun glare intensity
atmo.Haze = 1.5              -- haze amount
atmo.Parent = game.Lighting

ColorCorrection

local cc = Instance.new("ColorCorrectionEffect")
cc.Brightness = 0.05         -- -1 to 1
cc.Contrast = 0.1            -- -1 to 1
cc.Saturation = 0.15         -- -1 to 1
cc.TintColor = Color3.new(1, 0.95, 0.9)  -- warm tint
cc.Parent = game.Lighting

Bloom

local bloom = Instance.new("BloomEffect")
bloom.Intensity = 0.8        -- glow strength
bloom.Size = 24              -- glow spread (pixels)
bloom.Threshold = 1.2        -- brightness threshold to bloom
bloom.Parent = game.Lighting

DepthOfField

local dof = Instance.new("DepthOfFieldEffect")
dof.FarIntensity = 0.3       -- blur intensity far from focus
dof.FocusDistance = 30        -- distance in studs to focus point
dof.InFocusRadius = 20       -- radius of sharp area
dof.NearIntensity = 0.2      -- blur intensity near camera
dof.Parent = game.Lighting

SunRays

local sunRays = Instance.new("SunRaysEffect")
sunRays.Intensity = 0.15     -- ray visibility
sunRays.Spread = 0.8         -- how far rays extend
sunRays.Parent = game.Lighting

Setting Mood with Global Lighting

local lighting = game.Lighting

-- Daytime bright
lighting.ClockTime = 14
lighting.Brightness = 2
lighting.Ambient = Color3.fromRGB(140, 140, 140)
lighting.OutdoorAmbient = Color3.fromRGB(130, 130, 130)

-- Nighttime spooky
lighting.ClockTime = 0
lighting.Brightness = 0.5
lighting.Ambient = Color3.fromRGB(20, 20, 40)
lighting.OutdoorAmbient = Color3.fromRGB(10, 10, 30)
lighting.FogEnd = 200
lighting.FogColor = Color3.fromRGB(15, 15, 30)

---

Sound + Animation Sync

For general sound (SoundService, positional audio, SoundGroups), use mcp-roblox-docs. This section covers only the animation-specific pattern.

Triggering Sounds with Animation Events

-- Sync a footstep sound to walk animation markers
walkTrack:GetMarkerReachedSignal("Footstep"):Connect(function()
    local footstep = Instance.new("Sound")
    footstep.SoundId = "rbxassetid://112233445"
    footstep.Volume = 0.5
    footstep.PlaybackSpeed = 0.9 + math.random() * 0.2  -- slight variation
    footstep.Parent = character.HumanoidRootPart
    footstep:Play()
    footstep.Ended:Connect(function()
        footstep:Destroy()
    end)
end)

---

Camera Effects

Camera Shake

local camera = workspace.CurrentCamera
local RunService = game:GetService("RunService")

local function shakeCamera(intensity: number, duration: number)
    local elapsed = 0
    local originalCFrame = camera.CFrame
    local connection: RBXScriptConnection

    connection = RunService.RenderStepped:Connect(function(dt: number)
        elapsed += dt
        if elapsed >= duration then
            connection:Disconnect()
            -- Camera returns to normal since CameraType is usually
            -- "Custom" (player-controlled)
            return
        end

        local progress = 1 - (elapsed / duration)  -- decay over time
        local shakeX = (math.random() - 0.5) * 2 * intensity * progress
        local shakeY = (math.random() - 0.5) * 2 * intensity * progress
        local shakeZ = (math.random() - 0.5) * 2 * intensity * progress

        camera.CFrame = camera.CFrame * CFrame.new(shakeX, shakeY, shakeZ)
    end)
end

-- Usage: moderate shake for 0.3 seconds
shakeCamera(0.5, 0.3)

Zoom Effect

local TweenService = game:GetService("TweenService")
local camera = workspace.CurrentCamera

local function zoomCamera(targetFOV: number, duration: number)
    local tween = TweenService:Create(camera, TweenInfo.new(duration, Enum.EasingStyle.Quad, Enum.EasingDirection.Out), {
        FieldOfView = targetFOV,
    })
    tween:Play()
    return tween
end

-- Zoom in for dramatic moment
local zoomIn = zoomCamera(40, 0.5)
zoomIn.Completed:Connect(function()
    task.wait(1)
    zoomCamera(70, 0.8)  -- zoom back to normal
end)

Focus / CFrame Lerp

local function focusOnPoint(targetCFrame: CFrame, duration: number)
    camera.CameraType = Enum.CameraType.Scriptable

    local startCFrame = camera.CFrame
    local elapsed = 0
    local connection: RBXScriptConnection

    connection = RunService.RenderStepped:Connect(function(dt: number)
        elapsed += dt
        local alpha = math.clamp(elapsed / duration, 0, 1)
        -- Smooth step for natural feel
        local smoothAlpha = alpha * alpha * (3 - 2 * alpha)
        camera.CFrame = startCFrame:Lerp(targetCFrame, smoothAlpha)

        if alpha >= 1 then
            connection:Disconnect()
        end
    end)
end

Cutscene Waypoint System

type CutsceneWaypoint = {
    cframe: CFrame,
    duration: number,
    easingStyle: Enum.EasingStyle?,
    holdTime: number?,  -- pause at this point before moving on
}

local function playCutscene(waypoints: { CutsceneWaypoint })
    camera.CameraType = Enum.CameraType.Scriptable

    for i, waypoint in waypoints do
        local style = waypoint.easingStyle or Enum.EasingStyle.Quad
        local info = TweenInfo.new(waypoint.duration, style, Enum.EasingDirection.InOut)

        local tween = TweenService:Create(camera, info, {
            CFrame = waypoint.cframe,
        })
        tween:Play()
        tween.Completed:Wait()

        if waypoint.holdTime and waypoint.holdTime > 0 then
            task.wait(waypoint.holdTime)
        end
    end

    -- Return camera control to player
    camera.CameraType = Enum.CameraType.Custom
end

-- Usage
playCutscene({
    { cframe = CFrame.new(0, 50, 0) * CFrame.Angles(math.rad(-90), 0, 0), duration = 2, holdTime = 1 },
    { cframe = CFrame.new(20, 10, 20) * CFrame.lookAt(Vector3.new(20, 10, 20), Vector3.zero), duration = 3 },
    { cframe = camera.CFrame, duration = 1.5, easingStyle = Enum.EasingStyle.Sine },
})

---

Best Practices

Performance Budgets

• Max ~200 particles per emitter -- more than this and you risk frame drops, especially on mobile.
• Limit total active emitters -- aim for fewer than 20-30 active emitters visible at once in any scene.
• Particle texture size -- keep textures small (64x64 or 128x128 PNG). Avoid large or high-res particle textures.
• Beams -- keep Segments reasonable (10-30). Very high segment counts cost draw calls.
• Tweens -- hundreds of simultaneous tweens are fine; thousands may cause issues. Cancel/destroy tweens when no longer needed.
• Sounds -- limit simultaneous playing sounds to ~20-30. Destroy one-shot sounds after Ended.

Disable Effects on Low-End Devices

local function getQualityLevel(): string
    local quality = UserSettings().GameSettings.SavedQualityLevel
    -- quality is Enum.SavedQualitySetting or an int 1-10
    if quality == Enum.SavedQualitySetting.Automatic then
        -- Use a heuristic: check current graphics quality
        local level = settings().Rendering.QualityLevel
        if level <= 3 then return "low"
        elseif level <= 6 then return "medium"
        else return "high" end
    end
    local numQuality = quality.Value
    if numQuality <= 3 then return "low"
    elseif numQuality <= 6 then return "medium"
    else return "high" end
end

local function applyQualitySettings()
    local level = getQualityLevel()
    if level == "low" then
        -- Disable post-processing
        for _, effect in game.Lighting:GetChildren() do
            if effect:IsA("PostEffect") then
                effect.Enabled = false
            end
        end
        -- Reduce particle rates
        -- Disable shadows on dynamic lights
    end
end

Pool VFX Objects

Avoid creating and destroying particles every frame. Pre-create a pool and enable/disable or reposition them.

local VFXPool = {}
VFXPool.__index = VFXPool

function VFXPool.new(template: Instance, poolSize: number): typeof(setmetatable({}, VFXPool))
    local self = setmetatable({}, VFXPool)
    self._pool = table.create(poolSize)
    self._available = table.create(poolSize)

    for i = 1, poolSize do
        local clone = template:Clone()
        clone.Parent = workspace.VFXFolder
        -- Disable all emitters
        for _, emitter in clone:GetDescendants() do
            if emitter:IsA("ParticleEmitter") then
                emitter.Enabled = false
            end
        end
        self._pool[i] = clone
        self._available[i] = clone
    end

    return self
end

function VFXPool:get(): Instance?
    local obj = table.remove(self._available)
    return obj
end

function VFXPool:release(obj: Instance)
    -- Reset position, disable emitters
    for _, emitter in obj:GetDescendants() do
        if emitter:IsA("ParticleEmitter") then
            emitter.Enabled = false
        end
    end
    table.insert(self._available, obj)
end

Sync Sound with Visuals

• Use MarkerReachedSignal to trigger sounds at exact animation frames.
• Play impact sounds at the moment of collision, not when the swing starts.
• Match PlaybackSpeed to animation speed adjustments.
• Use task.delay or tween Completed events for sequenced audio.

---

Anti-Patterns

Unlimited Particles

-- BAD: unbounded particle creation with no cleanup
RunService.Heartbeat:Connect(function()
    local emitter = Instance.new("ParticleEmitter")
    emitter.Rate = 500  -- extremely high rate
    emitter.Parent = somePart
    -- never destroyed, accumulates forever
end)

-- GOOD: reuse a single emitter, burst when needed
local emitter = Instance.new("ParticleEmitter")
emitter.Rate = 0  -- manual emission only
emitter.Parent = somePart

local function burstParticles(count: number)
    emitter:Emit(count)
end

Unoptimized Particle Textures

-- BAD: 1024x1024 high-res texture for tiny particles
emitter.Texture = "rbxassetid://huge_4k_texture"

-- GOOD: 64x64 or 128x128 simple shape on transparent background
emitter.Texture = "rbxassetid://small_optimized_circle"
-- Use LightEmission = 1 with simple shapes for clean glow effects

Synchronous Animation Loading Blocking Gameplay

-- BAD: loading animations in a hot path synchronously
local function onAttack()
    local anim = Instance.new("Animation")
    anim.AnimationId = "rbxassetid://123456789"
    local track = animator:LoadAnimation(anim)  -- may yield on first load
    track:Play()
end

-- GOOD: preload animations at character spawn
local attackAnim = Instance.new("Animation")
attackAnim.AnimationId = "rbxassetid://123456789"
local attackTrack: AnimationTrack  -- forward declare

local function onCharacterAdded(character: Model)
    local animator = character:WaitForChild("Humanoid"):WaitForChild("Animator")
    attackTrack = animator:LoadAnimation(attackAnim)
    attackTrack.Priority = Enum.AnimationPriority.Action
end

local function onAttack()
    if attackTrack then
        attackTrack:Play()
    end
end

Other Anti-Patterns to Avoid

• Tweening properties every frame via RenderStepped instead of using TweenService -- TweenService is optimized internally and handles cleanup.
• Not disconnecting camera shake connections -- leads to permanent jitter.
• Setting Camera.CameraType to Scriptable and forgetting to restore it -- player loses control.
• Not cleaning up Highlight after its Adornee is destroyed -- orphaned Highlights waste one of the 255 slots. Use AncestryChanged to auto-destroy.
• Destroying a part while effects are active -- particle bursts, trails, and beams vanish instantly. Reparent to a temporary holder + Debris if you need graceful cleanup.
• Playing sounds without ever destroying them -- memory leak. Always clean up one-shot sounds via Ended.
• Creating hundreds of PointLights with shadows enabled -- massive performance hit. Use Shadows = false for most dynamic lights.

---

Complete Hit Effect System

A production-ready system combining white flash, particle burst, sound stinger, and camera shake. Designed for client-side use (LocalScript or module required from a LocalScript).

--[[
    HitEffectSystem
    Combines visual and audio feedback for combat hit registration.
    Run on the CLIENT only (camera shake and local VFX).
]]

local TweenService = game:GetService("TweenService")
local RunService = game:GetService("RunService")

local HitEffectSystem = {}

-- Configuration
local DEFAULT_CONFIG = {
    -- Flash
    flashColor = Color3.new(1, 1, 1),
    flashDuration = 0.15,
    flashRevertDuration = 0.25,

    -- Particles
    particleBurstCount = 20,
    particleLifetime = NumberRange.new(0.2, 0.5),
    particleSpeed = NumberRange.new(8, 15),
    particleSize = NumberSequence.new({
        NumberSequenceKeypoint.new(0, 0.5),
        NumberSequenceKeypoint.new(1, 0),
    }),
    particleColor = ColorSequence.new({
        ColorSequenceKeypoint.new(0, Color3.new(1, 1, 1)),
        ColorSequenceKeypoint.new(1, Color3.fromRGB(255, 200, 50)),
    }),
    particleTransparency = NumberSequence.new({
        NumberSequenceKeypoint.new(0, 0),
        NumberSequenceKeypoint.new(0.7, 0.3),
        NumberSequenceKeypoint.new(1, 1),
    }),

    -- Sound
    hitSoundId = "rbxassetid://123456789",  -- replace with your asset
    hitSoundVolume = 0.8,
    hitSoundPitchVariation = 0.15,           -- random pitch +/- this amount

    -- Camera shake
    shakeIntensity = 0.4,
    shakeDuration = 0.2,
}

-- Pre-create a reusable particle emitter template
local function createHitEmitterTemplate(config: typeof(DEFAULT_CONFIG)): ParticleEmitter
    local emitter = Instance.new("ParticleEmitter")
    emitter.Name = "HitBurst"
    emitter.Rate = 0                             -- manual emission only
    emitter.Lifetime = config.particleLifetime
    emitter.Speed = config.particleSpeed
    emitter.SpreadAngle = Vector2.new(180, 180)  -- omnidirectional burst
    emitter.Size = config.particleSize
    emitter.Color = config.particleColor
    emitter.Transparency = config.particleTransparency
    emitter.LightEmission = 1
    emitter.Drag = 5
    emitter.RotSpeed = NumberRange.new(-180, 180)
    return emitter
end

-- Emitter cache: one emitter per part (lazily created)
local emitterCache: { [BasePart]: ParticleEmitter } = {}
local emitterTemplate: ParticleEmitter? = nil

local function getOrCreateEmitter(part: BasePart, config: typeof(DEFAULT_CONFIG)): ParticleEmitter
    if emitterCache[part] then
        return emitterCache[part]
    end

    if not emitterTemplate then
        emitterTemplate = createHitEmitterTemplate(config)
    end

    local emitter = emitterTemplate:Clone()
    emitter.Parent = part
    emitterCache[part] = emitter

    -- Clean up if part is destroyed
    part.Destroying:Connect(function()
        emitterCache[part] = nil
    end)

    return emitter
end

--[[
    Flash the target part white and tween back to original color.
]]
local function flashPart(part: BasePart, config: typeof(DEFAULT_CONFIG))
    local originalColor = part.Color
    part.Color = config.flashColor

    local tweenBack = TweenService:Create(
        part,
        TweenInfo.new(config.flashRevertDuration, Enum.EasingStyle.Quad, Enum.EasingDirection.Out),
        { Color = originalColor }
    )
    tweenBack:Play()
end

--[[
    Emit a burst of particles from the hit location.
]]
local function emitParticleBurst(part: BasePart, config: typeof(DEFAULT_CONFIG))
    local emitter = getOrCreateEmitter(part, config)
    emitter:Emit(config.particleBurstCount)
end

--[[
    Play a one-shot hit sound with slight pitch variation.
]]
local function playHitSound(part: BasePart, config: typeof(DEFAULT_CONFIG))
    local sound = Instance.new("Sound")
    sound.SoundId = config.hitSoundId
    sound.Volume = config.hitSoundVolume
    sound.PlaybackSpeed = 1 + (math.random() - 0.5) * 2 * config.hitSoundPitchVariation
    sound.RollOffMaxDistance = 80
    sound.RollOffMinDistance = 5
    sound.Parent = part
    sound:Play()

    sound.Ended:Connect(function()
        sound:Destroy()
    end)
end

--[[
    Apply a short screen shake that decays over time.
]]
local function shakeCamera(config: typeof(DEFAULT_CONFIG))
    local camera = workspace.CurrentCamera
    if not camera then return end

    local elapsed = 0
    local intensity = config.shakeIntensity
    local duration = config.shakeDuration
    local connection: RBXScriptConnection

    connection = RunService.RenderStepped:Connect(function(dt: number)
        elapsed += dt
        if elapsed >= duration then
            connection:Disconnect()
            return
        end

        local decay = 1 - (elapsed / duration)
        local offsetX = (math.random() - 0.5) * 2 * intensity * decay
        local offsetY = (math.random() - 0.5) * 2 * intensity * decay

        camera.CFrame = camera.CFrame * CFrame.new(offsetX, offsetY, 0)
    end)
end

--[[
    Main entry point: trigger the full hit effect on a target part.

    @param targetPart  The BasePart that was hit (e.g., a character limb or NPC body).
    @param overrides   Optional table to override any DEFAULT_CONFIG values.
]]
function HitEffectSystem.play(targetPart: BasePart, overrides: { [string]: any }?)
    -- Merge config with overrides
    local config = table.clone(DEFAULT_CONFIG)
    if overrides then
        for key, value in overrides do
            (config :: any)[key] = value
        end
    end

    -- Fire all effects simultaneously
    flashPart(targetPart, config)
    emitParticleBurst(targetPart, config)
    playHitSound(targetPart, config)
    shakeCamera(config)
end

--[[
    Clean up cached emitters (call when resetting scene or on player leave).
]]
function HitEffectSystem.cleanup()
    for part, emitter in emitterCache do
        emitter:Destroy()
    end
    table.clear(emitterCache)
end

return HitEffectSystem

--[[
    USAGE EXAMPLE (in a LocalScript):

    local HitEffectSystem = require(script.Parent.HitEffectSystem)

    -- When a hit is confirmed (e.g., via RemoteEvent from server):
    hitRemote.OnClientEvent:Connect(function(targetPart: BasePart)
        HitEffectSystem.play(targetPart)
    end)

    -- Custom overrides for a critical hit:
    hitRemote.OnClientEvent:Connect(function(targetPart: BasePart, isCritical: boolean)
        if isCritical then
            HitEffectSystem.play(targetPart, {
                flashColor = Color3.fromRGB(255, 50, 50),
                particleBurstCount = 40,
                shakeIntensity = 0.8,
                shakeDuration = 0.4,
                hitSoundId = "rbxassetid://critical_hit_sound_id",
            })
        else
            HitEffectSystem.play(targetPart)
        end
    end)
]]