plane tras. image opeque

anyone know how to set a plane transparent, and a image opeque?:rolleyes:
You would regularly use this to create shadows, I think…

Hmm. Not sure exactly what you mean. An image format like png can be used for partial transparency. You put the image on the plane, then switch to uv face select. Click the alpha button in the buttons menu and the transparent channel of the png file will be transparent in the game engine. There is also a shadow option which makes it part of the ground plane.