Why does a gap appear between my Main Floor and Foundation in 3D?
A missing or misplaced subfloor may cause a gap to appear between floors in 3D. The subfloor supplies the
skirting of the exterior surface material down to the floor system for elevations and 3D models. If your plan
doesn't have a subfloor, or if you've moved a wall and haven't realigned the subfloor with that wall, you may see a
gap.To solve this problem, you can either (1) add a subfloor, or (2) realign an existing subfloor with the wall(s)
above. Use Cleanup to align the subfloor with studs.