Something weird is going on with your card. Update your drivers.
The mesh is copied, inverted, and then expanded. It looks like it is not being inverted OR expanded there. So that's a bug.
The only other possiblity would be a zbuffer issue. You can try running in 32 bit color mode if possible, but it doesn't look to me like what you would get if there were a zbuffer issue.
The mesh is copied, inverted, and then expanded. It looks like it is not being inverted OR expanded there. So that's a bug.
The only other possiblity would be a zbuffer issue. You can try running in 32 bit color mode if possible, but it doesn't look to me like what you would get if there were a zbuffer issue.