4 Replies Latest reply on Mar 9, 2012 2:45 PM by gsellers

    Sprites rendered with Alpha Test On do not render if Multisampling

    Chuckles_UK

      Hi,

       

      I've got a bug where rendering sprites with alpha testing (but no alpha-blending) doesn't appear to work when rendering to an anti-aliased frame buffer.  I'm using OpenGL and the card in question is an HD5670, but this may apply to other cards too.  The same code works fine on a number of other (non-ATI) graphics cards, so I'm guessing the problem is either:

      1. A bug in the ATI driver
      2. A 'feature' of OpenGL that is supported differently by different platforms - the documentation surrounding the use of Framebuffers and the reporting of errors seems to be sadly lacking.

      Does anybody have any suggestions?

       

      Cheers,

      Charles

       

      Charles Blessing

      Senior Programmer

      Team17 Software Ltd.