For full functionality, we recommend downloading the source format.The converted file is intended exclusively for browser preview. In the source file, the following are fully preserved:✔ original scene hierarchy✔ all materials without simplification✔ accurate texture maps✔ correct object namesIf you intend to use the asset in a production environment, choose the original version.The commercial building has 2 parts It has two parts on two sides of the window and can be used together.