sry for asking a question here again, but here it goes:
which are the most important extensions?
well for sure the ones for creating index/vertex buffers, fragment/vertex shaders and textures.
but what other extensions provide functionality that cannot be accomplished by the extensions used for doing the already listed stuff (index/vertex buffers, fragment/vertex shaders and textures)?
it seems that some extensions can be completely replaced by shaders - so there is no real point in using them except for convenience - or does it just seem that way?
edit: i'm simply asking this to figure out which extensions are worth taking a closer look at. the goal is currently writing a simple(*) shooter but the code should be VERY extensible.
(*) just some spheres representing players and projectiles and cylinders representing the lookat directions :P