   Weird screen quad artifacts
  Hi, I've been working on d3d9 project for a while now and it involves the use of render targets to store packed data in buffers etc. I'm getting some weird problems when it comes to rendering my screen quad ... the issue has been lurking about for a while .. it's basically a strange artifact that appears in stripes across the quad. They are usually the same vertical stripes with the outlines of the triangles that compose the quadIf anyone has any ideas or knows what the problem is I'd really appreciate your inputThanks   
  Just a wild guess. Have you considered that Direct3D 9 uses an half pixel offset when it comes to rasterization.   ;  Hi thanks for the idea, it turns out I was reading from an undefined texture in my pixel shader :)   