Texturing with PBR based textures, albedo, roughness/metallic/gloss, normal while using secondary texturing within Substance Painter for small defined objects.
Setting up shader values per mesh object based on their material physical source e.g. concrete, plastics, metals, etc
Editing of models, editing of any errant UV shells, clean up, optimizations and/or corrections as needed etc.
Lighting the scene setting up coloration of scene
Setting up fans then replacing with instanced animated fan meshes via script.
Baking scene Lightmapping w/ Baked Global Illumination with customized Lightmap parameters for optimal Baking results.