This should be easy, but how in the heck do you specify one or more types of insulation that is WITHIN the framing studs?
If I specify wall type "Siding-6", I get a wall with studs displaying in 3D framing overview, but no insulation showing, between exterior and interior siding, in doll house view (just empty space). And no insulation listing in the material list, just the materials for the exterior and interior layers.
If I change the "fir stud" material to an insulat