Using decals on glass

[Billabong]

Does anyone have any work arounds to applying decals on curved double sided glass. Corona decal wont work because it shows on the back side of the glass because of how tight the curve is. I tried doing a poly select with a corona layered material, but then is gives me this really ugly stretched part of the decal on polys I dont even have selected. I also tried close the polies and just applying the decal to that, but since this is only a mask with a white material, you can tell at certain angles. Been dealing with this for a few years now, was just curious if I'm missing something.

 Thanks for any help.

[Billabong]

Here is what happens when I try to do the poly select. Look to the right of the actual decal.

[TomG]

Use a front/back map in the material for the Decal, and have the back be a map that is totally transparent (all alpha)? Or use a front back map into the opacity for the decal so that the back is full opacity?

[Billabong]

That worked perfectly!! Thank you so much Tom!

-B

[TomG]

You are welcome, glad it worked!