As the title suggests, I think a neat feature to have in the OpenStudio Sketchup plugin would be some indication (besides a lighter/more yellow shade for the surface) of where a surface’s normal vector is pointing. This would be an additional validation/check in addition to the color of the surface.

Having an actual arrow showing the normal direction would be awesome, but I’d settle for a start-end of a vector too.

This would help a user figure out if a surface is oriented properly to its respective space.