I’ve been doing ready-to-play maps for Foundry VTT since its launch in May 2020. These maps are preconfigured with walls, light sources, doors, and weather effects. If you are a Foundry VTT license owner, you can download my free Battlemap Starter Pack here. You can install this module also straight from the Foundry VTTs dashboard (Modules tab > Install Modules).
I also have premium map modules available to my Hero+ tier patron on Patreon.
Premium modules come with multiple scene variants, written journal notes, and ambient soundscapes.