Gorgeous! Really getting that nice chromatic abberation feel of the Control fx. Would love some insight/breakdown on this 
So I tried the same thing, but I couldn’t do depth reprojection. I don’t know if the math is wrong or if what I intended as reprojection is different from what’s needed. I can capture the particles in the grid, their color, velocity, and depth. I maintain depth in a buffer for several frames, but the transformation part… I can’t get it to work. Do I have to transform the buffer depth to world position and then transform it to screen position?