Anyway to fix/eliminate these vertical streaks?

[Anonymous]

I have added some 3d renderings to my working drawing set and have noticed these vertical streaks that make the building appear not to be sitting on terra firma. They make the house look like it's blasting off for outer space a bit.
The surfaces that are doing this are made with the roof tool with 1/8" per foot slope to indicate the ground sloping down and away from the house. I converted them to morphs to see if that would correct the problem, no luck.

Does anyone know why archicad is doing this? I suppose it could also be my video card and if so does anyone know of a setting that can be adjusted to eliminate these streaks?

My video card is listed below with my system specifications.