I´m using Rhino 7 and the new Datasmith RhinoExporter 4_27_2 to twinmotion.
It already works much better than some weeks ago but still not as good as the old Twinmotion direct exporter (see my videolink, where I show you all issues): https://youtu.be/vUUcGehDWx8
What doesn´t work: Submaterials in one object. This worked with old exporter but let twinmotion crash or makes surfaces transparent with datasmith.
What works really well: material thickness and round edges!
What can work better: material only works, when you use “Mapping channel” and apply a “Box mapping”.
WCS doesn´t work and all settings in size/Offset in material doesn´t work than just the object specific mapping.
In an older video of mine on minute 28, you can see that submaterials worked in Twinmotion 2020 direct exporter: https://www.youtube.com/watch?v=H1ZHx6r2G5E&t=1701s
It would be really great if you fix this. I teach at university, we like twinmotion but are not happy with export/import from Rhino right now.