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How do you tell OpenGL ES 2.0 to use a texture as the depth buffer?

I want to render a scene with an outline post processing effect in OpenGL ES 2.0. First I render all the opaque objects. Then I use a post processing shader for silhouette detection that uses the ...
1
vote
1answer
96 views

Drawing sprites messes up my model in XNA4

I have a model which draws correctly in XNA4. However if I try to add a background image (or any sprite), the rendering of my model is messed up. There are two problems with the rendering model is ...