All bunkers share the same concrete material.

All doors are separated (from the bunker) and each door has it's own material with 2048 x 2048 textures (Albedo,Metallic,Normal).

All textures are 2048 x 2048 (except the light mesh which is 1024 x 1024).

Light triangle count: 482.

Concrete board triangle count: LOD0 108, LOD1 20.

For all meshes triangle count, please see the screenshots below.