Users want to see every surface they enter (regardless of status as party surface or conditions on other side). Here is a multifamily file (walls do not consistently show up, while ceilings and floors do) and a single family (interior walls only appear if unconditioned on other side but not to a unvented attic). They tell me this is different than it was in 2016. Didn't know to whom to assign this.
Diff:
r1812: Removed exclusion of demising interior wall surfaces so as to export ALL IntWall instances to CF1RPRF XML