   Quad = 48px width and height
  Eyall,I'm making a 2D game with tiles. How to let the tile have exactly 48 pixels height and width? Because the textures are 48x48, and when my tile isn't 48x48 the texture will be over-streched...etc.How?Thanks,Decrius   
  setup a projection with gluOrtho2D with the "size" of the viewport and scale your texture with the aspect.   ;  Or, you could do something similiar like:glOrtho(0, ScreenWidth, 0, ScreenHeight, 0.0f, 100.0f);Then one unit is one pixel. Of course, this is orthographic, so if you want depth in your 2D game, you're out of luck. ;)   ;  Be sure to build mipmaps for your textures, with gluBuild2DMipmaps, if your textures will be 48x48, or OpenGL wont tolerate.   