Video nVidia 8800GTS 320
When setting shadow map to 8192, anytime in an area where self shadow would take effect (i.e. in cockpit, but not in tower), my system shows nothing but a black screen, and will not recover. It does however still appear to be running AH fine without video as I still can hear vox and other sounds occuring. Alt-F4 to close the program works fine.
Setting to 4096 or lower works great! Considering my 320M of video memory, I don't expect to run at 8192, but I tend to try things out anyway. =) Just thought it was odd it went to a black screen.