is it possible to use a mask (an alphamask) globaly on jit.gl.render? (with slab: alphaclue or alphablend?) I have different videoplanes and need the same mask on each of them. It would be cool to mix the videoplanes together and use the mask afterwards....
(or is it even possible to use an alphaimage on a videoplane on the upper layer and use this for masking everthing beneath?)
Second question: is it possible to crop a liveimage (jit.qt.grab)? I only need a part of the image and since the cameraresolution is quite high, maybe it would also help the performance of my computer, if I "throw" the rest away. Or doesnt it make any difference in performance what I output ( I only mask the image), because the input is always the entire image anyway?
Thanx for help!