Silhouette-Outlined Diffuse

Author: User:AnomalousUnderdog.

Description
A variant of Outlined Diffuse 3 showing outlines only at the exteriors of the object. Useful for showing which character is selected in a strategy game, for example.





Bumped version:

Outline Only Variant


The thing that does the trick here is "Blend Zero One" which is to completely forego rendering our object and use only the destination color (i.e. whatever is behind the object). In effect, the object itself is invisible, but we still let the outline render itself. So that's what we're left with: only the outline.