In the last installment of the Video Processing System we left off with the beginnings of a basic live effects chain with basic compositing, blur, and color effects. Now that we’ve spent time building some basic interface wrappers for the jit.gl.slab object, it’s time to start diving a little deeper. In this installment, we’ll be working on some more advanced ninja tricks – creating the beginnings of a control/preset structure with assignable LFOs, and building a GPU-based video delay effect. These two parts will bring our system to a much more usable level, and allow for much more complex and interesting results. Ironically, most of what we are really doing in this installment is just an extension of bread-and-butter Max message passing stuff.