Opacity and decal

1. does vissible = visible?
2. if the bottle is clear [as in see through like glass] then yes you can put a decal on it
3. if the bottle is invisible [as in zero opacity] then yes you can still put a decal on it but you have to work around the default settings i.e, remove the default white background
4. if a decal has zero opacity then you can NOT see it... that is what opacity means but understand transparency is different

I don't use Adobe AR or think it is worth learning so other people can talk about that