I can make decals in max 6 and apply them to opaque materials BUT when I apply them to transparent materials the material turns opaque. I know I'm doing something wrong but I don't know what. Any help will be appreciated.
Graham; I tried so many different things I can't remember all of them. I'm sure I created an alpha image and put that and the "regular image in the Material Editor. When I applied those to an opaque material it worked fine. It was only when I applied them to a transparent material that the transparent material turned opaque. I suspect there is something in my sequence that is wrong, but I can't figure it our. Thanks, Mickey
Well without a little more info It will be hard to pin down what is wrong as there are a fair few ways you can achieve the effect your after.
Are you using Vray?
If so don't add an opacity map to a Vray material set to glass as it wont work properly.
If using a standard material:
My guess would be to check the specular level value as if this is greater than zero then you may see a specular sheen at certain angles even where there is supposed to be full transparency.
Also you could double check that your black and white transparency texture is used correctly in the opacity slot:
* Alpha source set to use the images RGB intensity
* Mapping channel set to the correct channel used in your UV mapping on the object.
Hope that helps
3D animator and VFX specialist