FBX Import: Material names are truncated when using the _skin## suffix

Development Rendering
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1

Unreal truncates the imported material names when using the _skin## suffix to set which slot they will get assigned to in the mesh.

Steps:
Import the attached FBX file (make sure Import Materials is checked), this is a cube with two materials; UpperSection_skin00 and LowerSection_skin01.

Unreal creates two materials named “LowerS” and “UpperS”, they should be “LowerSection” and “UpperSection”.

Load the FBX into MODO or Maya, the material names are correct.

Thanks.

link text

2

FbxMaterialImport.cpp
GetFullMaterialName

Should be:
MaterialFullName = MaterialFullName.Left(Offset);

Instead of:
MaterialFullName = MaterialFullName.LeftChop(Offset + 1);

3

Is there a different/better way of setting the material order please?

Thanks!

4

Hi mrtb,

I’ve entered a request for this to be considered. There may be a specific reason this was set up this way that I’m not aware.

You can follow the status of the ticket here: Unreal Engine Issues and Bug Tracker (UE-34243)

Thank you!

5

Great, thanks .
Pretty sure it shouldn’t be doing that, I guess most people must be importing without materials from the FBX and assigning materials made in UE4!

6

Just had a look at the ticket and see that it’s flagged as a new feature, pretty sure it’s a bug!

7

Hey, I’ve messaged an engineer who may know why this is. To me, it seemed since it was a deliberate choice to chop the text that there may be reason behind it to make it more in line with a feature request. Once I hear back I’ll let you know and chance the status of the ticket as needed.

8

Update: After speaking with an engineer, he said this is actually part of the material refactor work he is doing. He didn’t say specifically which version this was targeted, but I would assume this is for a 4.14 target. I asked for clarification, but he’s currently out of vacation so I’m not sure exactly when I’ll hear back.

9

Hello , thanks for the quick reply.

If this is being re-worked for 4.14 it would still be great to get a fix for it in 4.13

BTW the comment above the line in question is:

“// remove the ‘_skinXX’ suffix from the material name”

So the intention from the comment would be that “UpperSection_skin00” is changed to “UpperSection”, not “UpperS” :slight_smile: