Signal Brush

Ghosted typography brightens only where the pointer paints across it, leaving a measured trail that cools back to rest.

• Identity studies
• Title treatments
• Type-led campaign moments

• A mask-constrained light brush reveals only pixels belonging to the live word
• Interpolated cursor samples create a continuous trail instead of isolated halos
• Follow speed, radius, retention, and cooldown describe distinct brush behaviors
• An autonomous pass keeps the component demonstrable without pointer input
• Every live control maps to the component's own motion and rendering contract
• The protected source is a complete portable React and CSS implementation

Adaptive sampling, capped DPR and visibility-based suspension keep the renderer predictable. Test density on low-power mobile hardware before increasing it.

Pointer and touch coordinates are container-scoped; offscreen renderers stop work and pixel ratio is capped.

The visual canvas is decorative by default. Pair it with a semantic heading or description, and reduced motion holds a stable rendered frame.