World model LOD fixes - 6 prefabs drawing every LOD at once MilitaryFlamethrower, ak47u_jungle, scrap, crankshaft1/2/3 and stone had LODGroups with null or duplicated renderer refs, so every LOD drew at once regardless of distance. LOD0 optimisation pass on these too: 47,280 -> 22,675 tris world models where applicable combiend into single worldmodel mesh for simplicity and optimisation, reducing highlight draws when item is dropped: flamethrower 4 → 1, jungle AK 3 → 1, crankshafts 3 → 1 each, scrap 2 → 1