Build a place. Then play in it.
A separate Virtual Tabletop is planned for playing digitally in environments made with the Masterful Dungeons tile system.
Design in the Builder.
Play in the VTT.
The Builder and VTT have different jobs. One creates the environment; the other will support playing in it with friends.
The long-term idea is to connect rooms, floors, and maps as separate scenes through doors, stairs, and other entrances.

A future part of the same system.
Shared tile definitions and community designs should make the products work together over time. The VTT will be a separate development project.