Hasta La Motion!

This is just simple script… i’m using uvproject to place a 2d text on a cube. So the text node become the texture for the cube/box. Now as i look at the cube in 3d space through my camera , from all angle i can see all 6 text projected on each face of the cube. Problem is I only want to see text which is projected on surface which has Normal point/toward the camera (front face only), i don’t want to see texture on the back face. I tried to change ‘project on’ to ‘front’ with no luck. Anyone can explain why i can still see all the text on 6 faces ?

btw i also try the project3d node, when set project on to : front, i can still see the black texture at the back face.