   double sided quad
  ok lets say I have this 3d world and a quad with a texture in it. but this quad is only visible from 1 side. how can i make it visible on both sides.   
  Either you can render the quad twice or disable backface culling. To disable backface culling, you'd do something like this:d3d->SetRenderState(D3DRS_CULLMODE, D3DCULL_NONE);   ;  hmm I rendered it twice with the normals flipped, it still didnt work   ;  The normal doesn't matter. What matters is the order the vertices are rendered. (Clockwise or counter-clockwise)Check out the documentation for D3DRS_CULLMODE.   ;  oh sweet. got it thanks   