Hi there, I've made a new example how to build a particle system using a compute shader in TouchDesigner. This one is based on instancing and uses a heightmap for the particle to collide with. I tried to explain everything as much as possible using little textDATs docked to most components.
In this tutorial we break apart 3D objects likes boxes and spheres by using the point data for instancing and combining this data with noise.
This is a boilded down version of my Serum system (example). It's a 2D particle system and there's no GLSL involved! Feel free to play around and be inspired. Always credit me when sharing results. Non-commercial use only, contact me otherwise.
