where do you want the jit.slide? if you're trying to smooth out the vertex matrices, then you can simply put it right before your "append quad_grid"

Thanks. I want to use the patch in conjunction with a number of others in a sort of modular performance so I want to be able to get the output into a pwindow so i can mix the videos together. I've looked into doing this using matrixoutput but I'd personally find it easier if i could use pwindows.

if you're talking about a pwindow that is the destination of a gl context, you can't get it's output. there are several solutions for this though, such as gl.asyncread, and gl.node.

the the recommended way to mix multiple gl scenes together generally is to capture the scene with gl.node @capture 1, and mix the output textures with something like a gl.slab, or a jit.gl.pix.

Thanks, I'm using gl.asyncread and its working pretty well for me :)