I seem to be having a graphics issue related to creating a rendering chain using postprocessing stages. Even if I have no effects applied, simply having the stages setup in my code seems to be enough. The effect is very random, (maybe every 10-30 seconds) and is a quick flicker, usually in a corner of the screen.

I was able to catch a quick before-and-after snapshot (I happened to have postprocessing effects in use this time):




Here is a quick video I was recording - you can see the screen flash around the 5 second mark.

When the following lines are commented out the flicker does not seem to occur, though I can't be 100% certain (obviously this disabled the postprocessing effects):

Code:

camera.stage = postprocessor1;
postprocessor1.stage = postprocessor2;
postprocessor2.stage = postprocessor3;
postprocessor3.stage = postprocessor4;
...



I updated my graphics card drivers tonight, they were 6 months old. This did not affect the problem.

Details:
Nvidia GeForce 8600 GT
Gamestudio Commercial 7.07 / WED V6.854
DirectX Version: DirectX 9.0c (4.09.0000.0904)
Microsoft Windows XP
Pentium 4 CPU 3.20 GHz
3.00 GB of RAM