Polygon count is 373,000. Sounds not much but the heavy stuff are the textures. As the station’s height is nearly 7 km. they need a lot of details to get the scale. So, there are about 375 megabyte of PNG textures.
All shading and lighting is done in Redshift. The main hangar has a lot of lights, so I baked them into a 16bit EXR light and GI map for faster renders.