Pre-Calculated Bump Mapping

Pre-Calculated is the easiest technique to simulate bumps on a surface. A good example of this technique is the Mask Screensaver that is available for PCX2. You can find an mpg-file of that screensaver at www.powervr.com.

This technique uses a light and shadow map that was calculated at the time the demo was coded. You can use this technique when camera - objects and lights make no real movements compared to each other and in the demo this is the case. The position of the bump mapped balls stays the same in relation to camera and light source they stay in the same position and move in a plane. This lightmap is blended on top of the texture. The effects are good but limited.