Select the object that used to be a curtain wall, click Edit in Place, select one panel > Edit Type > Click on the name of the Material, and check the Graphics properties. It could be that the option for "Use graphic appearance" needs to be activated. That's what I can report after making a test about this.
@Anonymous wrote:
...Does Revit get details from IFCWall differently?
I don't know that. IFC is another format, and several things get lost in the translation.
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