redbox
(redbox)
2
You shouldn’t use brushes for such complex geometry. Better to optimize it, use as semi-solid brushes, or even convert it to static meshes.
There is bsp tessellation view, Alt + 1 or Alt + 2, in which you can see actual bsp polygons geometry.
https://docs.unrealengine.com/udk/Three/UsingBspBrushes.html