I have an urgent problem to solve: I must apply the logo of a manufacture on a glass which I must animate. The problem is, although my files are in PSD or tiff, the front face is correct but the back face is completely black and opaque. I apply this image on the texture map and the alpha channel. I know that there is at least a specialist here who will be able to help me… My basic image is a .jpeg from which I removed the white zone in PS. Help please !!!

Hi DUDU,

When applying a logo to a surface I usually do it this way: Create a Layers List. Your first layer is the main object shader, your second layer is a Rectangular Layer. On the rectangular layer just put a black and white alpha mask image in the Opacity Mask (white where you want something to appear and black where you don't), Don't put anything in the Alpha and don't check White is Invisible on the map.

Now that's an great workin tip

Not easy at all in my case because of the multiple shading domains, but that works. I will make a sreenshot of your process which I didn't know. Thousand thanks Mark !

No problem - happy to help. I just wish I new what was wrong with the way you were originally doing it, because I would have thought that would work too.

Not easy to find the good place, size and orientation for the logo on the jpeg, but this first test is a good start. Impossible to do it with a shader domain on the glass, that don't work. Thanks again !!!

It may also be worth it to know that if you use an image with an alpha channel or transparency, such as the Photoshop file you mentioned, or another format that supports alphas such as .png or .tiff, etc. you can just stick the image map in the Color channel and not even bother using the Alpha channel.