@zoomer; thanks for your insight, I always find your thoughts useful. For me, tho I do not need IFC yet, modelling incorrectly feels just wrong and goes against the core reasons I model in 3d to begin with: "I drew this, it is buildable as drawn." I am also the proud possessor of C4D R18, and - who has time? Just to learn proper import skills takes time, think EAlexendar and his thousands of lights which need to output as they were focussed in VW, and here's a daily problem in my world: VW Spotlight fixtures can deploy shutters or frames to block the light internally, so as to keep light on only the items one wants, but where is this essential-to-me-and-common-everyday-tool in VW in C4D?