the interior floorplans were all done in an extremely time-consuming process, where I had to extract meshes, diffuse and normal textures, convert them into useable file types, and then import them into a 3d modelling application, where each model was reassembled and given a new material made from the extracted and converted texture maps. Then, the basic geometry (floor and walls) was made and also textures where applicable. Light sources were added according to where they would realistically be in a room or sunlight shining through windows. Then the whole scene was rendered from above with an orthographic camera, and the resulting image edited in Photoshop to add the wall outlines and to resize and crop it.