(Yes I know I jump from one unfinished thing to the next one. The KMotionCapturer update should come sometime soon).
Inspired by [the work of d1ver] at the forums I’ve reworked my level Master Material. The significant part is that the material uses only a NormalMap (which includes a HeightMap inside it) as artist-created textures, the rest is semi-procedural: it’s colored via a Gradient Mapping technique (using the HeightMap), then it blends 4 extra detail textures (all packed in the same one) at different scales and intensities, and does some edge detection (using the HeightMap) to add damage to “edges” in the texture.
It works alongside the standard BumpOffset used for parallax bump, and some extra Gradient Mapping used as Specular too.
The result using a rush-job texture in some very poorly UVWMapped dungeon hallway meshes is the following: