Version 12 actually has it somewhat built in and is way easier to set up. I'm still waiting a bit for the "dust to settle" for a bit to see if I should make an update.

Glad you liked it!

I genuinely apologize for the delay was out of the country for a few weeks. The creator of this map is Reclusive Cartographer, and I do personally love his maps. He does provide on most maps, inside areas like the one of the video, separated from the main encounter map. I prefer these as a DM make things easy to track for me, as a DM, when different players are doing different things(or encounters). There's a link in the description to his page. However, as a good rule of thumb, I do merge maps with multiple layers in Photoshop, and export as WEBP, as Foundry does support it, and also makes the load time more bearable. If you check the token video, the landing page, is a lot of "maps" merged.

Ok @@RPKris that's very handy using WEBP to reduce the loading page! I got a player from other continent and he has problems loading the pgn or jpg (20mb) files.

If you right click on the drawing, you have options to create layers. If you push the layer back(down arrow) it will technically make it invisible. Hope this helps! (there is a possibility that this is affected by a different module, which is called FXMaster, let me know if it is so)