What we learn putting real buildings in front of real clients — IFC exports, site AR, and the parts of BIM that only bite in practice.
Civil 3D routinely writes an IFC that declares inches while the coordinates are millimetres. Every measurement you take off it is then wrong by 25.4×, silently, with a confident number attached.
WorkflowEvery browser-based viewer asks you for an IFC rather than the Revit file itself. That isn't laziness. Here is what each format actually carries, and which one to export for which job.
PerformanceWe had only ever tested on a 113 KB sample house. Three architect-issued IFCs later, we found the defect that would have made the product unusable on a real project — and the numbers that fixed it.