I think the lower edge could be rendered even more subtle, to prevent railway-like appearance when top edge and bottom edge are very close steep slope. Tag naming is a different issue. De Introductiecursus Revit voor de prefab betonindustrie is gericht op gebruikers die met IC-Prefab willen gaan modelleren, maar nog geen Revit ervaring hebben. To maybe later show the entirel slope as shaded or line shaded Dutch: gearceerd, from the verb arceren a relation with the top edge line and the bottom edge line woud be needed. So a block is a mini drawing which you can copy in your scene.
nest...