"There really isn't much to it. All I did was go to the Material Editor and replace the bitmaps in the decal with the png version-- I can't remember whether I had to change both the Color and Opacity (I think so.)
"If the preview was running you'll need to reload. Any changes you make to the objects won't be captured automatically. (I need to change the "Go" button color or something when ardecal command is used.
If this doesn't…"