Python FBX SDK 2020 - Issue with FbxGeometryConverter.MergeMeshes

[Anonymous]

Hello!

Currently running into an issue with the MergeMeshes function found in the FbxGeometryConverter class. I am finding that data such as UV’s and vertex normals are not being preserved correctly after merging, but others such as material id's are correct. This happens even with the simplest example of 1 cube and 1 sphere, which are combined to generate a new mesh. I've included screenshots of a before and after. Is this a bug? 

[regalir · Accepted solution]

It does, indeed, looks like there is a bug in the merge process code of the FbxGeometryConverter class in the FBX SDK. We are going to work on this as soon as possible and, hopefully, provide the fix on the next release of the FBX SDK.

Thank you for reporting this issue.

[jzy946929203]

Hello,

I have encountered the same issue. It is now 2023, and the version of the FBX SDK is still at 2020.0.1. I would like to ask if there will be any future updates to the FBX SDK and if this bug will be fixed.

[regalir]

Hi,

there have been several releases since 2020.0.1 and I believe the issue with the "merging" of the UVs have been resolved a while back. Here is the page with all the previous releases: https://www.autodesk.com/developer-network/platform-technologies/fbx-sdk-archives

and the latest release can be found here: https://www.autodesk.com/developer-network/platform-technologies/fbx-sdk-2020-3-4

[jzy946929203]

Hi,

I previously had version 2020.2, and now I have tried using FBX SDK 2020.3.4, but the issue still persists. The MergeMeshes function causes the loss of UV information other than UV1.

[regalir]

The GeometryConverter::MergeMeshes() is designed/coded to only process the first element of any given LayerElement type (UV, Tangent, Binormal, Crease, etc.). I can open a ticket for an improvement request but, at the moment, I am unable to tell if/when it will be addressed.

[jzy946929203]

Alright, thank you for your reply.

I suddenly realize that I am somewhat unrelated to this issue. Thank you for your patience.