Glitches again

[Dr. Zeppers]

What generally causes that is your system or video card failing to load the textures.

Often a reboot will solve this problem. It 'can' be a sign of problems with your videocard if it is happening more and more frequently (probably a failure of some of the memory on the card).

Its a neat effect to be sure. I have had it happen when trying to run too much stuff on my system (it was lacking in resources).