Welcome to the forum!!
The current curtain wall mapping (V1) is simple as it does not capture any of the mullion information from SketchUp. It takes the boundary of the curtain wall and then uses the Revit type based mullion arrangement, if one is specified in the Revit type. We do have many ideas on how to expand this functionality and groups those ideas into version 2 and version 3 of curtain walls. The diagram below expands on these possible updates. I’ve also updated the main roadmap post to include V2 and V3.
V1 Curtain Walls (complete)
- simple face based wall with wall boundary
- component based with wall profile extraction
V2 Curtain Walls
- place curtain wall gridlines per SketchUp location for vertical and horizontal mullions
- detect parallel majority of gridlines so that verticals and horizontals can use various angles beyond 0 and 90
- map curtain panels by material or tag to Revit elements: doors and other curtain wall panel types
- handler for mullions that cannot be natively built at the designed angle in Revit within the same curtain wall element, by creating adaptive components
V3 Curtain Walls
- extract the centerline geometry of the mullion geometry so that curtain walls modeled with actual thickness can be transferred to Revit (until now, the geometry had to be schematic lines)