   Shadows
  I have following problem with shadows. I am using old-fashioned technique, just drawing an object, projected to plane. I am using blending, 'cause I wanna keep floor texture visible a bit. But in this case I have blending interference:What can be a solution?   
  Experiment with different parameters to glBlendFunc. I think GL_CONSTANT_COLOR has something to do with it.;  u could use the stencil bufferclear stencil to 0set stencil test pass if its equals 0draw shadow + incr for each passthus each pixel in the framebuffer will only recieve shadow once   