Well, not exactly “dead” but kinda dusty. The forum just opened a short while ago and not many people know its here yet…

So… without an image to refer to, what is the problem? Your projected decal is “transparent” when applied onto an object that already has a glass shader?

EDIT (since it seems to be the thing to do):

I think you mean you are not seeing the “black” portions of the image you’ve applied as a Decal, right?

Okay, you need 2 image files for an image-based Decal in Showcase like the label on a bottle; one is the full color image (which is loaded in the Material “Color” section) and the other is a Grayscale “mask” image (loaded in the Material “Decal” section) where 100% black is “cut out” and 100% white is totally opaque (and shades of gray make semi-transparent areas). If you only load an image into the Decal section, it will cut out any black areas and use the “Color” section of the material for the opaque areas. Does this make sense?

The intention here is that if you want some effect like a blue carpaint star on an object that is otherwise brushed metal material, you’d only use the “Decal” section to maket the star shape and the rest of the material would be the blue carpaint. Try it: apply Brushed Aluminum to an object, select the object, then go to the Car Paint materials section and *right-click* on the “Blue” paint and (from the pop-up menu) choose “Assign to selection as Decal.” Voila!

If you look at the Material Properties of that new Decal (Ctrl-M, when the little green star-shaped “grip” is selected) you’ll see that the “Color” is blue, but the “Decal” is a white star (totally opaque) on a black background (totally transparent).