When I switch Design Options in Revit, materials reset in Twinmotion. How do I keep materials set?

Development Programming & Scripting
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1

I am working in Revit 2024.2
I have a Revit model with 2 design options. When I switch between them, the materials in the option set default back and I lose whatever materials I’ve applied to them earlier. How do I stop this from happening?

2

I am having the same issue, also in Revit 2024.2 with Twinmotion 2023.1.2

3

You must import both models separately, and if you’re going to re-import, you should re-import the same one from both files. When exporting, make sure each export matches the model with the file name it belongs to.