I’d like to create a thick outline around an object, like a highlighter pen, but I was wondering if its possible to draw it behind the geometry. here is an example of what I have so far:
https://dl.dropboxusercontent.com/u/24304389/outline.jpg
as you can see, the outline overlaps the geometry, centered at the contour line.
I’d like to occlude it by geometry both for visual effect and so I can set the outlines to overshoot, covering some corners better without being visible on the geometry.
Any ideas welcome!