Map editing tools?

Hey I was wondering if there was some kind of map creation tools to make an interior (Just the walls floor and ceiling) as I am really bad at this with 3d modelling software. I always leaves seams or hole. Thanks ps something like hammer sdk but simpler for unity :stuck_out_tongue:

Try Prototype from the asset store. It’s a cut down version of Probuilder, just doesn’t let you set textures.