FBX Importer: Staticmesh socket rotation is not import correctly

Tools - Jul 23, 2018

The fbx axis rotation conversion is apply twice for socket since they are local to the static mesh ...

Import options broken when importing bones-only fbx animation

OLD - Anim - Jun 19, 2015

This bug is being entered for integration purposes. This is already fixed in 4.9 Main with one of Lina's changes (CL:2584657). Wanted to try and get this into a 4.8 hotfix ...

Imported animation has one more frame than the original fbx

OLD - Anim - Jul 19, 2016

In UE4.12, imported animation has one more frame than the expected frame number. AS_AN_StepAnim_Test.fbx is 60 frame long animation(starts at frame 0, ends at frame 60). When imported to UE4.12, it ...

FBX Bulk Export Dialog Not Showing Network Drives

Tools - Nov 7, 2016

When trying to bulk export FBX assets networked drives don't appear in the dialogue window. *The user has noted that networked drives do appear if you export a single asset.* ...

Animation - Imported fbx animation mesh appears distorted

TM - Tools - Apr 9, 2025

Reported by user in SF [Link Removed] An animated FBX file from Mixamo appears with a distorted mesh inside Twinmotion. Distortion appears regardless of settings used for import. ...

Alpha Textures reimported via overwriting disappear from level

UE - Graphics Features - Nov 10, 2014

When you reimport a texture that has an alpha by Importing and then overwriting the previous texture, all versions of that texture in any material or in the level complete disappear until you compil ...

Crash reimporting Geometry Cache with Per X Frames

UE - Gameplay - Aug 12, 2016

Crash occurs when the user reimports a geometry cache asset and changes the Sampling Type to Per X Frames. This seems to only occur if Frame Start is set to a value other than 0. ...

Mismatching Between Visual and Collision of Destructible Mesh Using Import FBX Chunk

When you use "import FBX chunk" function of destructible, Mismatching between visual and collision occur. ...

FBX imported skeletal mesh has incorrect axis directions

UE - Editor - Content Pipeline - Import and Export - Aug 20, 2019

The axis the FBX is imported with has been inversed from prior versions. See attached screenshots. This causes issues specifically with vehicles, where the movement is happening into the forward dir ...

Shadow Color Not Updated After Light Build When a Texture is Changed and Reimported

UE - Graphics Features - Jun 2, 2017

Creating a material using a texture (say, blue) and then changing the source file on the texture and reimporting will not update the shadow color after building lighting. Making changes to the mate ...