tendril_rock

Cave rock for the crawler part. Binds preseed.shaders.cave_rock (triplanar PBR) to the baked tileable rock set under preseed/tendril/textures/:

• rock_albedo — slate rock with mineral strata and crack veining
• rock_normal — crack/chip detail normals
• rock_rm — glTF roughness/metallic (wet-pit gloss variation)
• rock_height — meso displacement; sampled BOTH by the shader (cavity occlusion) and by the Tessellation component on the cave tunnel mesh, which subdivides and displaces the walls from this same map.

Worn by the cave tunnel, stalactites, stalagmites, columns and rubble in preseed/tendril/cave.module.