Most of us know about opacity and how blocking light can actually show what would be truly visible to a person if the world was three dimensional. This opacity system is almost exactly what I want to use for my shooting system because I want the player to only be able to shoot what is truly visible to them. However... I don't want to actually black out parts of the map just to make this work.

So, is there a way to use this true sight idea without blacking out areas by using opacity?

Thanks :D