   GLSL Program Feedback
  Hi!  I've written a shader that does a simple texture interpolation with a triangle.  The concept was to assign each vertex a texture, and it interpolate the texture across it much in the same way it would a color.  The way I did this was hi-jacking the use of a "color" buffer, and using the r, g, and b values as the texture0, texture1 and texture2 ALPHA values, to keep things simple and have OpenGL handle the interpolation.  The effect is (from what I can tell) exactly what I wanted.So the textureAlpha buffer looks like this: {1,0,0,  0,1,0,   0,0,1}What I'm asking is if this is an OK way of achieving my desired effect, or is this kind of a hack and there's a more standard way of achieving this effect.   