>>389359168
A room is just a double-sided box with different materials for the walls, ceiling and floor. Get free prefabs for your chairs/table/lighting fixtures. Get free pbr textures off the internet for the materials. Use >>389359308 for lighting/post-processing. If you find the right prefabs, you might find that you don't actually need to actually model that much to make a world. In some ways, world creation can be easier than avatar creation.