Problem backgroundsuppression

I am using the block backgroundsuppression with a webcam usb.
then the block contour and at the end renderer (ex9). when I put the renderer in fullscreen the substracted background changes and the contour notices some objects that are not there.
how can I resolve the problem?

I attach the file of test

background.v4p (20.5 kB)

I’ve experienced the same problem. I was able to fix it by using keyboard input to trigger “get background.” That way you can recapture the background after you have made the window full screen.

in effects so he resolves.
I have also resolved saving the substract image in a file jpg and substracting with filetexture.

thanks for the help.