Other Builders
Dungeon Architect ships with a few smaller builders next to the main ones. They are simpler and have fewer settings, but they still work with themes, marker emitters and the rest of the theming tools
Simple City builds a grid city with roads, houses and parks. Each road piece gets its own marker, so you can theme crossings, corners and dead ends separately
Floor Plan (Legacy) splits a building into rooms and hallways, floor by floor. New floor plan work is happening in Cell Flow floor plans
To switch a Dungeon actor to one of these, select it and pick the builder from the Builder Class dropdown in the details panel