Sample the same pattern three times, each channel shifted a little along x, and the colours come apart at every edge like a cheap lens. The offset is the knob; the bars underneath are only there to give the edges something to split.

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Live
rive-shader-library.revIn the Scripting Course

Chromatic on its own artboard in the library file, with the ShaderQuad node and the WGSL, Inputs for Offset, Bars. Copy the artboard into any Rive file.

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Ripple
Pixelate
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.