This guide will provide you with images of objects showing boos 'coming out of them' to show they spawn from that particular object. This will aid in identifying objects boos spawn out of, and what rooms they do spawn in as a result. As mentioned in the folder read me this is not exhaustive. https://drive.google.com/drive/folders/1huIQuTOpXY290eTiCPXJJ2ibdVFZf-cM?usp=sharing the above link will take you to the folder, organized by floors.