persistent-corner-chrome

name	persistent-corner-chrome
description	motion-graphic primitive — a top-left ticker / corner brand tag / corner ornament that renders ABOVE all scene content for the entire spot duration. continuity branding — gives the piece a "section of a larger work" identity. canonical sp-c (going net zero) and sp-d (sessions brand tag).

persistent-corner-chrome

Purpose

Render a fixed brand element (text ticker, logo mark, crop-marks) in a canvas corner that NEVER unmounts across the spot. Implies the spot is one section of a larger piece — strong continuity branding.

Params

{
  "type": "corner-ticker",               // corner-ticker | brand-tag | crop-marks | watermark
  "position": "top-left",                // top-left | top-right | bottom-left | bottom-right
  "offset_px": [60, 60],

  "content": "GOING NET ZERO →",
  "font_family": "Inter",
  "font_size_px": 22,
  "font_weight": 500,
  "letter_spacing": "+0.04em",
  "case": "upper",
  "color": "#1F1F1F",

  "fade_in_at_frame": 0,
  "fade_in_duration_frames": 18,
  "always_on": true
}

Behaviour

Render as an absolutely-positioned <AbsoluteFill> OUTSIDE the <Series> of scenes. It sees composition-global frame and is always visible. Fade in over the first few frames so it doesn't pop in jarringly.

Style pack overrides

• SP-C (editorial-cinematic) — "BRAND TAG →" ticker top-left, plus crop-marks.
• SP-D (editorial-magazine) — "SESSIONS" brand tag bottom-left.

Quality Checks

• Renders ABOVE all scene content (z-index above <Series>).
• Never unmounts (visible at frame 0 and last frame).
• Doesn't overlap primary scene content (corner positioning).
• Font is consistent across scenes (it's a fixed overlay).

Failure Modes

• Chrome unmounts on scene change. Mounted INSIDE <Series> instead of as sibling. Move outside.
• Chrome covers primary content. Adjust offset_px or pick a different corner.
• Chrome flickers. Fade-in not applied; or chrome is re-rendered per scene.