Waking the ancient red dragon
Dungeonstock products that include a Universal VTT file (.uvtt / .dd2vtt / .df2vtt) can be imported directly into Foundry VTT, Owlbear Rodeo, and Roll20 with walls, doors, and lights pre-configured. Here's what to install on each platform.
Products with a Universal VTT file show a One-click ready panel on the product page, with tiles for Foundry VTT, Owlbear Rodeo and Roll20. If the Foundry tile says + Module included, the product also comes with a ready-made Foundry module. On Browse, the UVTT and Foundry module filters show only those products.
Install the free Universal Battlemap Importer module from Foundry's built-in module browser. Drag the .uvtt file onto a scene to import the map with walls and lights.
Some products also include a Foundry module.zip. Unzip it into your Data/modules/ folder to get the scenes exactly as the creator set them up.
Install the free UVTT-Importer browser extension. Open your Owlbear room and use the importer to load the .uvtt file as a scene with the Dynamic Fog walls pre-built.
Roll20 imports need the UniversalVTTImporter API script, which only runs on a Roll20 Pro account. On a Free or Plus account, upload the map image and add walls by hand.
The map files (PNG, JPEG, WebP or GIF images, and MP4 or WebM video for animated maps) and PDF setup notes work in any virtual tabletop, and the images and PDFs print fine. Walls and lights live in the .uvtt file, so you need one of the importers above to use them.