IFC export with wrong/missing colors in C3D 2025

[ThomasBHansen_]

I just upgraded to Civil 2025 and my IFCs comes out with missing colors on seemingly random objects.
If I export the same files with 2024 or older the IFCs are correct. Does anyone else have this problem.

See screenshot form Navisworks

[lim.wendy]

Hi Thomas,

Thanks for posting. Have you installed the latest Civil 3D 2025.1 update? If the issue persists, I suggest contacting Autodesk Support so that they can investigate further. 

[ThomasBHansen_]

Hi @lim.wendy 

I have now installed the lastest update, and it seem to help somewhat. I see however that if I open the IFCs with Naviswork and set the IFC-file reader to Legacy, the colors still comes out wrong. So, the simple fix is to just use the  newest (modern) file readers. 

I notice that the IFC exporter now allows for color overrides on objects. Earlier the exported IFC would inherit the 'layer color'. Can you confirm this?