Reference guide for 2D UI and screen-space interaction in Lens Studio — covering ScreenTransform anchors/offsets/size/pivot and coordinate conversions (localPointToScreenPoint, screenPointToLocalPoint, localPointToWorldPoint), ScreenImage (texture, stretch mode, color tint), Text component (content, font, alignment, color, size), ScreenRegionComponent for defining tap/touch areas, TouchComponent with TouchStartEvent/TouchMoveEvent/TouchEndEvent, tap input for phone lenses, LSTween UI animations (colorTo, moveTo on screen elements), multi-swatch color picker pattern, undo stack pattern, and common gotchas. Use this skill whenever a lens needs a 2D UI panel, tap interaction, on-screen buttons, text labels, color pickers, swipeable menus, or undo/redo — covering Drawing, Quiz, TappableQuestion, MemeSticker, MusicVideo, and HighScore examples.
Learn how to programmatically request and manage raw camera textures and crops.
Reference guide for face and body AR tracking in Lens Studio — covering FaceTrackingComponent setup (multi-face, faceIndex), FaceInset and FaceMask effects, 2D and 3D Face Attachments (hat/mouth/left_eye/right_eye anchors), Face Mesh UV texturing, Face Landmarks (68 keypoints), Face Expression weights for mouth-open/eye-blink detection, Eye Tracking component (left/right eye direction), Upper Body Tracking 3D asset (hips/spine/shoulder attachment points), Upper Body Mesh for seamless selfie occlusion, and Face Retouch/Eye Color/Face Liquify/Face Stretch effects. Use this skill for any phone or front-camera lens involving faces, selfie effects, makeup, face masks, 3D head ornaments, body tracking, or expression-driven animations — covering the vast majority of Snapchat lens content.
Learn how to dynamically instantiate prefabs algorithmically in grid or spherical patterns.
Implement proximity-based triggers and smooth tethering behaviors for interactive objects.
Learn how to track image markers and detach the tracked content into World Space in AR.
Reference guide for materials and shaders in Lens Studio — covering runtime material property changes (clone-before-modify, mainPass.baseColor, mainPass.opacity, mainPass.baseTex), blend modes (Normal/Alpha/Add/Screen/Multiply), depth and cull settings (depthTest, depthWrite, twoSided, cullMode), render order, material variants, assigning textures and render targets, reading and writing RenderTarget textures for post-processing, the graph-based Material Editor node system, custom shader graph nodes, and common shader pitfalls. Use this skill for any lens that needs to change material colors or textures at runtime, implement custom visual effects with shaders, set up post-processing render pipelines, chain render targets, or debug material/blend-mode issues — covering MaterialEditor, Drawing, and HairSimulation examples.
Reference guide for Lens Studio's math types and utilities — vec2/vec3/vec4/quat/mat4, MathUtils (DegToRad, RadToDeg, clamp, remap, lerp, inverseLerp), ScreenTransform 2D anchor/offset/size system, and Lens Studio's right-handed coordinate system (vec3.forward()=(0,0,-1)). Covers construction, arithmetic (uniformScale, dot, cross, normalize, distance), quaternion creation from Euler angles (pitch/yaw/roll XYZ order), quat.lookAt with parallel-vector guard, quat.slerp, combining rotations with multiply, getWorldTransform/setWorldTransform, mat4 inverse and transform extraction, and practical recipes: billboard, frame-rate-independent smooth follow, angle between directions, world-to-screen pixel position, project-to-plane, color lerp via vec4, ScreenTransform coordinate conversions, and parsing BLE sensor quaternion bytes. Use this skill for any 3D math, 2D UI positioning, position/rotation/scale arithmetic, or coordinate-space conversion in a Lens Studio TypeScript script.