While working on my translucent glass material, I suddenly noticed the same stripes and artifacts Kingsal has in his Volta 2 mission for all the water materials. They weren't there before, but it looks like I had in-game anti-aliasing set to x2. When I turned it off, the artifacts appeared. To test this, I launched Volta 2 with in-game AA x2, and the artifacts were gone. It seems like there's connection between in- game AA and refraction. I have no idea about engine programming, but isn't it something about engine precision? Maybe similar stuff to BSP holes and lower dmapping precision than