keithcurtis said: Pro Tip: If you do wind up assembling your map in Roll20 out of smaller pieces, also prepare a composite map at really low resolution, even 5-10 pixels per square. It really needs almost nothing in terms of quality, so a high compression jpeg is fine. Once you have you map assembled, upload that one, size it to match your pieced-together map and send it to the back. This has two benefits: 1) Certain zoom levels may produce an artifact where edges may not seem to line up. Having the image behind of roughly the same color will make those disappear. 2) It will appear first on load. On very slow connections this will let players realize that an image is there, and that the real images are still loading. 3) Most important: The thumbnail for the map on the page toolbar is created from the largest image on the page. Largest in terms of page real estate, not pixel dimensions or file size. So your thumbnail will be of the assembled map, no one of the pieces. Several of the poster maps in Roll20 are done this way, Example: the map of Waterdeep in Dragon Heist. Sounds like a stupid trick to me! :D (Or it could be added to your ' Precautions to Take With Very Large Maps ' item you had before). Either way, I'm definitely saving this for later! I didn't realize that point about the largest image being the one that becomes the thumbnail, which answers some questions I've wondered about test pages I've created.