With some of the recent changes to Unreal Engine 4, rendering multi-color outlines is now possible! This is done through the use of Custom Stencil, a new buffer similar to Custom Depth - but allowing meshes to render as integer values. This provides us with a 1-255 range of indices that can be used to apply different outline colors to meshes and even combine multiple features such as the decal x-ray shown below by using a different stencil index. The Original Custom Depth The original outline material I made last year was based on Custom...