   getting reflection effect
  what would be the easiest possible reflection effect got in games? Consider that u have a simple character standing on a refeltive platform.. and u want to get the character''s reflection on the floor.... so what would be the effective way to do it ?I have thought of two possibilities as stated below... are there more possibilities ?1. would it be shaders... which i think is expensive computation time... but very easily achieved on the latest machines with powerfull graphic cards...2. can it be polygon underneath the characters with camera raster images on it? 
  A very cheap and dirty way to do reflection (on a planar surface) is to simply mirror the character on the Y axis and slightly alpha blend the floor.  You can improve on this technique by using the stencil buffer to clip the mirrored model to the floor polygon.A fancier way to do this is with render to texture.  The biggest advantage of using render to texture is you can do all kinds of interesting effects to the reflected image and it will map nicely to arbitary surfaces.   ;  Render to texture... are you talking about the cubemap method? 