ultra realistic material enhancement of the existing 3d scene preserve exactly the original geometry volumes proportions camera position perspective scale and layout with no structural changes whatsoever improve only material realism and surface quality physically based rendering pbr materials high resolution textures for stone walls and ground accurate roughness normal and ambient occlusion maps natural color variation in stones and mortar subtle weathering erosion dirt accumulation and age patina realistic ground soil with layered textures earth gravel dust micro detail and natural irregularity lighting should remain consistent with the original scene enhanced only to better reveal material depth and surface detail without altering shadows direction or camera perception no changes to geometry no additions no removals no deformation no redesign focus exclusively on photorealistic material rendering and surface realism
