   Need help in Opengl texture compression
  Hello!I read in an Opengl performance tips ebook, that compressing textures speed up the game with 20-30%.How can I compress texture in real-time?How can I use it with mipmapping?Thanks.   
  Take a look at the tutorial at NVidia. It explains how to use texture compression.http://developer.nvidia.com/object/OpenGL_S3TC_tutorial.html;  And here's a rough draft (forgive the formatting) of a tutorial I wrote on OpenGL's texture compression.   ;  Thanks a lot!   ;  if youre geometry/cpu limited then dont expect any speedup at all, also compressed textures tend to look worse than uncompressed textures.>>How can I compress texture in real-time?<< yes its possible to let opengl compress the textures for you, though quite slow.>>How can I use it with mipmapping<<nothing special is required though watch out the smallest mipmaps get limited to 4x4 (ie theres no 8x2 4x1 2x1 1x1 etc)   ;  In practice, they won't speed up the game (at least not on cards such as GF4) but they WILL make the memory size taken by the game MUCH smaller (maybe twice as small).   