How to visualize a depth texture in OpenGL?

Question

I\'m working on a shadow mapping algorithm, and I\'d like to debug the depth map that it\'s generating on its first pass. However, depth textures don\'t seem to render properly

Answer 1

Depth textures (2D) can be used just like any regular grayscale texture. The only problem might be that the values inside it are all too high and you only see a white texture. If that's the case play around with the z-near and -far planes that are used when creating the depth texture (or scale the values with a shader or maybe glTexEnv).