eVoid Development Weblog Burn The Land And Boil The Sea But You Can't Take The Sky From Me

Z-Fighting Problem Solved

Thanks to an user named kRogue on the OpenGL forums the problem mentioned here is finally solved:

glTexParameteri( GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_ALPHA );

is not part of GL3 core... though it is there in a compatible context. Try taking that call out and use the .r component of the depth texture in your shader... this should NOT make a difference, but you never know.

- kRogue

Furthermore I've been notified that the problem didn't occur on a GF GTX260.

One more important aspect to notice that you should check if you should ever happen to run into the same problem as I did: The GL_MIN_FILTER and GL_MAG_FILTER properties of the depth texture object must be set to GL_NEAREST. At least they are not allowed to be set to GL_LINEAR. Don't ask me for the reason. Otherwise you will experience the same Z-Fighting as I did.