I'm working on a patch using a jitter matrix. I need to isolate a certain part of the image and turn the rest of the values in the matrix to 0 (in real time). I tried to use an MXJ object but have ran into issues with loss of frames, and the code was also not very good at accomplishing the task, even though logically it should have worked. Is there any object within the max library that could isolate a box in the image from four cordinates, i.e. the top left right and bottom left right. Any help would be greatly appreciated.