Procedural Environment Creation for Film and VFX

Design a procedural workflow for creating a massive [ENVIRONMENT TYPE] environment for a visual effects shot in a film production. The environment should feature [SPECIFIC ELEMENTS] and convey a [MOOD/ATMOSPHERE] feeling. Develop a comprehensive approach covering: 1) Terrain generation techniques with geological accuracy, 2) Procedural asset creation for [VEGETATION/STRUCTURES/ELEMENTS] with variation systems, 3) Scattering and distribution algorithms for natural placement, 4) Procedural texturing approaches for large-scale surfaces, 5) Atmospheric and environmental effects (weather, time of day, atmosphere), 6) Level of detail systems for optimization, 7) Integration with live-action footage considerations. Include specific software recommendations (Houdini, Blender, etc.), node/system diagrams descriptions, and techniques to maintain art-directability while leveraging procedural benefits.