Bumpmapping is an advanced multitexture blending technique that can be used to render the appearance of rough, bumpy surfaces. The bump map itself is a texture that stores the perturbation data. Bumpmapping requires two textures, actually.

我都梦想着拥有一台数字摄象机（DV），但是口袋里的银子不允许。不过今天终于可以实现这个梦想了，因为这一回我们就要说怎么在Ｄ３Ｄ中实现摄象机的功能（望梅止渴也好^_^）。-ok