mountainous landscape 3d model

A massive cinematic mountain environment graybox for Unreal Engine 5, large scale terrain blockout, giant mountains surrounding a deep valley, realistic landscape proportions, winding road through the mountains, cliffs, caves, bridges, ruins on top of peaks, strong composition for gameplay and cinematic shots, designed as an AAA open world level prototype, minimal materials, gray concrete and neutral surfaces only, no textures, no vegetation, pure blockout style, atmospheric fog, dramatic lighting, realistic scale, playable pathways, verticality, terrain variation, modular layout, Unreal Engine graybox environment, worldbuilding concept, top tier level design, wide cinematic shots, fantasy realism, highly detailed terrain shapes, optimized layout for exploration and combat encounters