PositionTexture, (3d programming sucks)

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ok, rotatetexture and scaletexture work.
Is this commonly known that positiontexture doesnt work on some brands? Is there a list of commands that you shouldnt use because you want to distribute a 3d game? I know my computer has a 50% chance of resetting on the EndGraphics command when a terrain was used. But warcraft 3 and AOM and warlords and marrowind work fine.