3D Modifier - Colorize geometry vertices with a 2D GeneratorUse a map (can be a Shared Element too). To color each vertex based on it's UV. To use this modifier over a particle set, either emit particles from a geometry or use a UV Mapping. As you'll see on the example below, that is what mean "per vertex color". On a low subdivided plane (10x10) you'll get something like that :
On a medium subdivided plane (64x64), you'll get something like that :
This modifier is so particularly effective over a particles system. You can use a Video Input as map to colorize your particles with what comes out of your webcam.
You can also try to combine it with Layer Intensity or Normal Map Layer + Optical Flow to a maximum funky fresh effect to the over top.
Here is a tutorial example using this modifier :
Watch directly on youtube
Advanced Presets: CheckerBoard, Compo, Noise, Parent Input and Video Input.
3D: Random Points Modifier (on a Plane).compo.
2D: Video Input (with Compo Based Modifier).compo.
Particles: Particles colored by layer (Colorize layer and Emit Particles modifiers).compo, Vector Fields (Normal Layer Field with Optical Flow).compo and Particle Rules - Kill particle based on color (with Color condition).compo.