   Clearing Backbuffer with texture
  Hi,how would I clean the backbuffer with a texture as opposed to a simple color using glClearColor(). Basically I would like to create a similar background like the new Maya 2011 in my physic test suite. See this screenshot for an example:http://francois.graphics-portfolio.com/index_files/maya_2011_running.jpgLinks where I can download such textures would be also very helpful :)Cheers,-Dirk   
  It isn't perfectly clear what you want the background to be, but you don't have to clear as such, just draw the texture right over the entire area that you want it in. For this one can use orthopgraphic projection set up to whatever makes sense, for example the screen width and depth.And I suppose one should clear the depth buffer after that.If it's the gradient part of the background only, you could just supply vertexcolors to the vertices when drawing the quad. The vertexcolors will be interpolated and thus giving you a gradient.;  Works! Thanks a lot. I disable depth tests when I render the quad in normalized screen coordinated. This seems to save me another call to glClear().Cheers,-Dirk;  glClear is a fast operation and it is also important because todays GPUs have optimizations like fast z-clear, fast-color clear, hierarchal depth buffer.   