The options you get in the SketchUp plugin (blind, shade, daylight redirection device, switchable glazing) are all that are supported by the Radiance Measure. The intent is to allow you to place something on the windows, for a modicum of glare control. Unfortunately you cannot define the specifics of the shading devices (e.g. the size/spacing of blind slats, or the openness of a shadecloth). The switchable glazing device gives you some flexibility, in that you can define the two constructions the device will use, at least.