The show goes on! Three more examples are on CodePen now. These pens are the examples of usage of shader material with point cloud. Also, you can find a nice trick in them - I used third dimension to create 2D animations. It’s much easier than puzzle out all the math to calculate such animations in two-dimensional space.
Looking for a step-to-step tutorial without mathematics?
Check out my article about WebGL shaders with examples adapted especially for UI developers (in Russian)!