Is it possible to change the a BSP Trace Channel?

I would like to know if there is a way to change a BSP’s Trace Responses.
I have created a custom Trace Channel called Movement Platform that is used to pick a destination for a top down character. This channel should be set to ignore for geometry like columns or walls.
The problem is that this way no longer can move on top of BSP geometry.

Bump, I have a similar problem where the BSP geometry causes GetHitResultUnderCursor(ECC_EngineTraceChannel3, true, HitResult) to return the hitresult on top of the BSP geometry rather then the static floor geometry under it with custom Trace Channel ECC_EngineTraceChannel3.