Multiple closely-spaced Gridshape objects leading to striation/pattern error

So, I've been working on this Jitter patch for awhile in a variety of forms and have run into a problem. I've placed a series of gridshape cube "screens" textured with video in space.

I then created open-cube frames to block off the video-texture on the left, right, top and bottom of these screens. This works fine until I begin to add more screens to the equation and switch the jit.gl.handle to the window control rather than object control.

When I alter the jit.gl.handle behavior I find that my interior screen's edges bleed/cause striations in the open-cube frame. This is especially apparent when I move in and out using the jit.gl.handle controls. Is there something utterly banal that I'm forgetting? I can't seem to find anyone else running into this problem in the forums. I've included my patch... just use any video for the "screens" and a black/white slug for the frames. Any insight would be greatly appreciated.

J