gm_construct 3d skybox fuck up.

At some angles, gm_construct flickers like this:

Afaik it only happens on construct. I also got this weird issue with my water:
As you can see on the left, It seems like faces with the grass texture are floating above my water? They are only visible from one angle.

Intel Pentium 4 3.2 GHz
nVidia 7600gs 512mb
2gb RAM


It also happens on other maps with 3d skyboxes.

Have you tried updating your video driver?

Yea, I got the latest.