🧩 Vertex Editor
The Vertex Editor tool is way better than I originally gave it credit for (sorry).
FIRST, vector snap must be turned on:
Hypothetical: Your existing BSP brush is too big, or shaped too regularly to pair with a different room or static mesh.
Use:
• Select brush. • Ctrl + alt to drag select (not in 3D viewport :c) or Ctrl + click to select 1 corner/vertex. • Ctrl + alt + shift to stack and continue selecting more vertices. • Preferably use 2D viewport to edit the dimensions as you wish so use hide actors for extra visibility as mentioned in tips.
⚠️ Warning: As mentioned, don't go crazy with angles, and NEVER turn off vector snap or you can rightfully embrace BSP holes and fall through the gaps between dimensions.
Bugs (if working with triangular BSP):
You can see this is likely related to jagged primitive collision, one solution in a similar case might be to break down the BSP into further horizontal subdivisions, I think I just remapped the pathing so they jumped outwards from each pillar, as opposed to in-between.