Sorry for the (almost) double posting, but i'm hoping to get to the bottom of this...so...
IS it possible in open GL to produce the effect in the first patch below? I want to sample pixels from a jit.qt.grab and "paint" them back on top of said video in another layer as ovals of varying dimensions. I have done this in the first patch with an LCD set to transparent and overlaid on top of the jit.pwindow. Sadly this can't be exported to a jit.window for display and is therefor no use.
I think it can be done using multiple jit.gl.videoplane layers and doing the painting with jit.gl.gridshapes @shapecircle but I am a bit lost in the GL world.
My stab-in-the-dark attempt is the second patch and, as you can see, it doesn't work very well.
Any advice, hints and comments much appreciated!