Layered leaf canopies under falling rain, lit by dim shafts of green-gold sunlight. Five stacked canopy layers of 26 crowns each are built from two shared InstancedMesh batches (leaf-blob icosaspheres and cone undersides) with per-instance vertex colors, keeping ~130 crowns in a couple of draw calls. Rain is 1,600 thin instanced cylinders recycled from top to bottom each frame, with impact bursts drawn as additive GPU-friendly Points particles spawned near ground and canopy height bands. Exponential fog (FogExp2) and two flickering additive sun-shaft cones fake volumetric light scattering through the foliage.