Quick update. After many trials, I've finally settled on a custom shader. In the Unity3d test render below, those are 3d models of characters and lockers with a shader generated outline. The UI elements are just pasted in to add a bit of flavor. I've written more about it in patreon.com/revolverroach/posts
raidenslicer
so great to see you back, i remember playing the OG retaliation and being saddened when you suddenly went dark.
welcome back to NG, i sure as hell missed you.