Three sines at different angles and speeds, added together, are mostly cancelling each other out. Raise the sum to the fourth power and only the spots where all three agree survive: thin bright lines that wander like light on the bottom of a pool.

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Live
rive-shader-library.revIn the Scripting Course

Caustics on its own artboard in the library file, with the ShaderQuad node and the WGSL, Inputs for Scale, Speed. Copy the artboard into any Rive file.

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Scanlines
Halftone
Stars
Free Rive file

Noise, as a Rive file, on us

The Noise shader with the GPU Canvas node wired and the WGSL inside. Drop it into any Rive file and see how a shader lives there.

The other 27, in the course

Every shader here, as a ready-to-drop Rive file

Play with all of them here. The library file, every shader on its own artboard, comes with the Scripting Course, next to the lessons and the Space Game it belongs to.