   Fade In/Out in Opengl
  hellocan anyone explain how fade in/out effects are done in a game..i am kind of looking to put such an effect in my game on the whole screen..currently using opengl..any advice would be of great help...   
  You can draw everything as usual and then draw a screen sized black quad on top of everything and slowly change its opacity to made a fade in/out.   ;  Alternatively, render everything to an fbo and fade that out.   