Wrong normals when importing from Revit exported by Twinmotion plugin. #74742

New Issue

Ejnar Brendsdal · 2020-03-13T21:01:27+01:00

Ejnar Brendsdal commented

2020-03-13 21:01:27 +01:00

System Information
Atatched system info.

Short description of error
The default FBX export of Revit works great after this commit: https:*developer.blender.org/T52846
But it is limited as Autodesk cripples the exported file to hide materials and other stuff. It works but only basic geometry gets exported.
The team behind Twinmotion (now Unreal Engine) has made an addon for Revit which can export a better FBX from your Revti Project.
The problem: While the new FBX has materials and nice collections and everything out of the box (nice!) it does have wrong normals again similar to the aforementioned issue.

Exact steps for others to reproduce the error
I have attached a zip with relevant fiels. An FBX Exported and the resulting blend file.

My hope is that the normals from these exported FBX could be made to work as well as the regular Revit FBX.
Thanks,

Twinmotion FBX Example.zip

system-info.txt

Test FBX import.blend

**System Information** Atatched system info. **Short description of error** The default FBX export of Revit works great after this commit: [https:*developer.blender.org/T52846 ](https:*developer.blender.org/T52846) But it is limited as Autodesk cripples the exported file to hide materials and other stuff. It works but only basic geometry gets exported. The team behind Twinmotion (now Unreal Engine) has made an addon for Revit which can export a better FBX from your Revti Project. The problem: While the new FBX has materials and nice collections and everything out of the box (nice!) it does have wrong normals again similar to the aforementioned issue. **Exact steps for others to reproduce the error** I have attached a zip with relevant fiels. An FBX Exported and the resulting blend file. My hope is that the normals from these exported FBX could be made to work as well as the regular Revit FBX. Thanks, [Twinmotion FBX Example.zip](https://archive.blender.org/developer/F8404047/Twinmotion_FBX_Example.zip) [system-info.txt](https://archive.blender.org/developer/F8404048/system-info.txt) [Test FBX import.blend](https://archive.blender.org/developer/F8404049/Test_FBX_import.blend)

Ejnar Brendsdal commented

2020-03-13 21:01:27 +01:00

Added subscriber: @EjnarBrendsdal

Germano Cavalcante commented

2020-03-16 15:50:10 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-03-16 15:50:10 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2020-03-16 15:50:10 +01:00

I checked different importers.
In fact in Blender the objects have the normal Smooth, but it should be flat or custom.

I checked different importers. In fact in Blender the objects have the normal Smooth, but it should be flat or custom.

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Wrong normals when importing from Revit exported by Twinmotion plugin. #74742