Projector on backfaces

Hi,

I'm trying to modify the projector shader so that it doesn't appear on the backfaces of objects.
I'm almost done but it still appears (like a light grey).

Here is the result with projector of "moon" on a "planet", and projectors of "moon" and "planet" on their own bodies.



I can't figure why. See the project attached.

Any ideas ?

 

I did not catch exactly what you are trying to do but you can use

Code (CSharp):

1. Cull back

For future reference please don't post the entire project, post only snipets of code or the shader x.x