Unable to Save or Close Editor after Copying .FBX to Content Folder via Project Directory

Tools - Jul 5, 2017

The editor is not allowing users to save or close a project after an .FBX file has been copied to the project's Content directory and allowing the Content Browser to discover the change in source fi ...

Sound Wave Actions Menu Closes Automatically When Changed to Columns View

Tools - Dec 15, 2017

After changing the view to columns (by going through Right click < Create Dialogue < View Options < Columns) the Sound Wave Action menu will close out automatically before any options can be selecte ...

Fog Does Not Behave As Expected in Splitscreen

UE - Graphics Features - May 25, 2018

This bug seems to repro very inconsistently for me, but I've seen it affect Atmospheric Fog and Exponential Height Fog, and reproduced in 4.18.3, 4.19.2, and Main CL 4093338. I've attached Config fi ...

Touch position return wrong value if the orientation of the terminal is changed after startup

UE - Platform - Mobile - Jan 26, 2022

Touch position return wrong data on Pixel 6 and Android 12. it does not occur unless the device is rotated from the initial state. As far as I investigate, the touch position only return data from ...

[AI] Navmesh tiles on different layers get removed while streaming out in WP Dynamic Modifiers Only navmesh

UE - AI - Navigation - Feb 6, 2025

 Streaming out the navmesh and streaming the area back into the world before the GC runs causes the navmesh streamed back into the world to only have navmesh tiles on a layer with tiles that would b ...

Rect light LTC textures fail to load when cooking with bSharedLinearTextureEncoding enabled

UE - Texture - Apr 2, 2025

When running a build with bSharedLinearTextureEncoding enabled, View.GGXLTCMatTexture and View.GGXLTCAmpTexture are pointing at the black texture fallback, which affects correctness of rect lighting ...

[MAC][OPENGL][METAL]: Investigate why planar reflections on translucent surfaces may not be working

Tools - Jun 29, 2015

See Comments. User reported planar reflections aren't being applied to translucent materials on Mac OpenGL, which may also affect Linux OpenGL and Mac Metal. Need to investigate what this feature r ...

[Mac][Metal] Black/NaN spots Visible in Templates With r.BasePassOutputsVelocity

UE - Platform - Apple - Apr 15, 2016

Base-pass rendering on Mac Metal now generates transient black/Nan spots across the scene - this appears to be related to r.BasePassOutputsVelocity and is presumably the connected to the incorrect s ...

Distance Field Mesh default resolution artifacts on some shape meshes

UE - Graphics Features - Feb 10, 2016

Distance Fields generated for the 4 basic static mesh assets in the modes panel appear to have artifacts or low resolution. This is only affecting certain shapes that I can see. Adding in assets fro ...

Extra Large Meshes Imported from Maya Flicker in Engine

UE - Simulation - Physics - Feb 16, 2015

Edit MattK: This probably has nothing to do with FBX. The object has a mass of 28 million kg so it would appear that the calculation of mass/physics asset is busted which is causing the flickering ...