modular rock block 3d model

Create a single modular rock piece designed for building large cliff formations. Photorealistic PBR style. The module should be roughly rectangular and stackable on all sides, with clean, flat contact areas on the top and bottom. Detailed natural erosion, cracks, stratification layers, and believable geological patterns. Medium-size silhouette breakup, rich micro-detail, realistic roughness variation. No overhangs. Neutral color palette (grey–brown sedimentary rock). Suitable for close-up shots and modular assembly in Unreal Engine. High-resolution textures, clean topology, no stretching.