2 Replies Latest reply on Apr 1, 2011 5:27 PM by KeithJeffery

    gl_FrontFacing not working


      One of our testers updated his ATI driver, and our fragment shader stopped working as expected. I updated my driver, and found the issue: gl_FrontFacing doesn't seem to be set to any meaninful value, i.e. testing

      if (gl_FrontFacing)


      if (!gl_FrontFacing)

      both return true.

      We're using an old version of GLSL. Our shaders are prefaced with:

      #version 110

      The details of this video card:

      Driver Packaging Version    8.831.2-110308a-115928C-ATI   
      Catalyst Version    11.3

      Graphics Chipset    ATI Radeon HD 4850