Hi. My understanding is GLSL support began in OpenGL 1.4 as an extension, but moved to the core spec in 2.0. I also know there are some differences in the extension vs core version of GLSL. I have a few questions about this: 1. For those of you who are using GLSL, are you currently targeting GL 1.4 or 2.0? 2. Suppose a graphics card supports has openGL 2.0 support. Will that card still have GLSL available as an ARB extension? 3. I know that GLSL had changed slightly with each version. For instance, in the latest version there is no ftransform(). Will a program running GLSL on a new video card still have access to ftransform if calling from the ARB extension version?

Thanks! I suspected the answers to #2 and #3 were yes. And now I realize the answer is 'duh', you don't have to run out and patch all the existing games on your system everytime there is a new version of opengl out!

As for #1, I think I'm going to have the policy of targeting the minimum version of GL that has what I want available as an extension. I would hate to lock out use of a feature on a card that supports it, just because they don't have the 'core' version of a particular thing.