Particles Follow Texture

[bendingiscool]

Hey,

I am after a way to have particles flow along a surface via a texture map, for instance if I had a strip of black down the centre of a texture, I would like the particles to flow down the black strip only.

What would be the best way to go about this.

Thanks, Chris

[gmask]

this is possible but it will require custom expressions to control the particles.

Basically you'd read the texture in as an array. Then you start the the particles animating on the surface based on the UV coordinates of the surface and then as they are moving they'd check to make sure they were on the path.