Mixamo Fuse FBX for UE4 issues

Development Character & Animation
1

Is it possible to modify a Fuse character in Blender? I found some workflow details on the Mixamo site but it was focused around animation. I am running into some odd results when I load a T-Pose skeletal mesh that has been imported/exported with Blender. The model looks fine on all other programs that can open FBX.

Here’s an image of a character I imported into Blender and exported without any modifications. It was auto-rigged on Mixamo and downloaded as T-Pose FBX for UE4.

e0ec6a45e683249ca8c53896fbc28cf3663d64e0.jpeg
e0ec6a45e683249ca8c53896fbc28cf3663d64e0.jpeg1920×1080 244 KB

Since I have no issues importing the original (non-Blender import/export) into UE4, I thought I could simply export the skeletal mesh from UE4 as a workaround. Unfortunately, that results in a crash to the desktop.


Assertion failed: (Index >= 0) & (Index < ArrayNum) [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.6\Engine\Source\Runtime\Core\Public\Containers\Array.h] [Line: 679] 
Array index out of bounds: 59 from an array of size 52


KERNELBASE.dll!UnknownFunction (0x00007ffbd8515bf8) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc1972f6d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc18060e8) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc17e9182) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffbaeb54b94) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffbaeb67684) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffbaeb12f6f) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffbae469638) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffbac1f0621) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ffbac1f1ac8) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffbae5cc52d) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffba3f1d0c0) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffba3f144dc) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffba3f20046) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf7f68a3) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf7fb058) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf77b747) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf77d299) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf7de419) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf884b9a) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf8b0a73) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf6e97bc) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf6a7347) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf74b2e0) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffbaf73c226) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc18de9d9) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc18ca1eb) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc18dfbab) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc18c6ce2) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffbd8fa2434) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffbd8fa2297) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffbc18e0066) + 0 bytes [UnknownFile:0]
UE4Editor.exe!FEngineLoop::Tick() (0x00007ff666f9cbda) + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launchengineloop.cpp:2193]
UE4Editor.exe!GuardedMain() (0x00007ff666f9089f) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\launch.cpp:131]
UE4Editor.exe!GuardedMainWrapper() (0x00007ff666f9090a) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() (0x00007ff666f9e3d9) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.6\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor.exe!__tmainCRTStartup() (0x00007ff666f9f319) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!UnknownFunction (0x00007ffbdabf16ad) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffbdb044629) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffbdb044629) + 0 bytes [UnknownFile:0]

Edit: I forgot to correct the scale for the screenshot. The same behavior occurs when the correct scale is imported.

2

Does it look correct in blender? Which blender version do you use? (have you tried the 2.7) For me it looks like some faces are probably inverted -> add a two sided material and see if the missing parts appears :slight_smile: