Unreal Engine Issues
Unreal Engine Issues
Some Twinmotion library assets do not render in Path Tracer in files with a large number of assets
TM - Rendering - Apr 17, 2025Reported in SF [Link Removed] In scenes containing large numbers of certain Twinmotion assets, when activating Path Tracer, some of the assets will not render. The assets will render normally in St ...
Landscape Change Component Size Tool removes foliage from landscape
UE - World Creation - Worldbuilding Tools - Foliage - Dec 12, 2017Foliage painted onto a landscape will disappear when Sections per Component is changed from 1x1 to 2x2. Affects 4.17.2 CL 3658906, 4.18.2 CL 3794801, 4.19 Main Possible Workaround is to set the Re ...
POM material triggers Video Driver Crash
UE - Graphics Features - Apr 26, 2016When a POM decal material is applied to a decal actor in the scene the video driver will crash. This worked prior to 4.11.0 release. Only when the material is assigned to a decal actor will the vide ...
Connecting a Client to a Server in PIE with Auto Connect to Server disabled will crash the editor
UE - Networking - Feb 22, 2016Connecting a Client to a Server in PIE with Auto Connect to Server disabled will crash the editor. EDIT: simple test project attached. Make sure Auto Connect to Server is disabled, and PIE with 2 p ...
Landscape Spline Width/Side Falloff does not respect Unreal Units.
UE - LD & Modeling - Terrain - Landscape - Nov 15, 2019The user reports that the Landscape Spline Width and Side Falloff isn't respecting Unreal Units in the Editor. The usage for comparison is a Cube that is scaled up 7x to Splines that have a Width of ...
Main Frame Window grows by 10x10 pixels upon each restart of the Editor
Tools - Feb 17, 2017With each relaunch of the Editor, the Main Frame Window grows by 10x10 pixels. The editor viewport, in turn, grows by a few pixels in response to that. See attached three images: Window1, Window2, ...
Duplicating a Function Containing Add Child Actor Component Causes Changes Made to the Duplicate to be Saved to the Original
UE - Gameplay - Blueprint - Nov 9, 2015When you create a function containing an Add Child Actor Component node, duplicate that function, and then change the Child Actor Class option in the duplicate, the changes are also saved to the ori ...
UMG Widgets using User Interface Material Domain do not render on Android Devices
UE - Platform - Mobile - Jan 19, 2016When using a Blueprint Widget that has an image using a material in the User Interface Material Domain will not render when it's a newly created project in 4.11. However, if you were to copy a proje ...
Stereo off while prox sensor uncovered causes low framerate
UE - Platform - XR - Mar 7, 2017Inputting 'Stereo Off' while the prox sensor is uncovered will disable stereo rendering but introduces large performance decrease. Stat FPS returns constant 10 FPS / 100 ms. Found on: //UE4/Release ...
"r.SetRes 1920x1080f" fails to set fullscreen mode when executed through blueprint node
UE - Graphics Features - Jan 19, 2016Executing the r.SetRes _x_f command fails to set fullscreen mode when executed through blueprint node. The issue occurs when executing the command through level blueprint and an actor blueprint plac ...