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.

新版的图像用sdk，虽然有点难用，不过对没时间的人很有帮助。-Developer’s Image Library was previously called OpenIL, but due to trademark issues, OpenIL is now known as DevIL. DevIL is an Open Source programming library for programmers to incorporate into their own programs

Direct3D+9.0+SDK.zip 帮助文件，使用查询起来非常方便。-Direct3D+9.0+SDK.zip help file, use Query very convenient.