Unreal Engine Issues
Unreal Engine Issues
UV Flipping Mode Causes Stretching of Particles
UE - Niagara - Nov 17, 2017If "UVFlipping Mode" under Rendering on the Required node of an emitter is set to anything other than "None," the particles can become stretched and distorted. As a workaround, I have discovered th ...
Unable to play replays with custom GameNetworkProtocolVersion set at runtime
UE - Networking - Sep 20, 2023It seems that when comparing the custom versions for a replay (in the "operator<<" defined in ReplayTypes.cpp), the value retrieved from the FCurrentCustomVersions is not the value set at runtime, b ...
Crash enabling Stochastic Rect Light with Ray Tracing
UE - Graphics Features - Lumen - Oct 13, 2020Enabling Stochastic Rect Lights with Ray Tracing causes the project to crash. Reported and tested in version 4.26.0(CL 14419252). Tested and not found in version 4.25.3(CL 13942748). ...
Creating Widget at run time with an exposed variable causes Engine crash with Assertion
Tools - May 8, 2020If you are using the default values of the In Size the project will run fine, but changing the values will make the engine crash. This was reported and tested in 4.25 (CL-13144385) and reproduced i ...
Non-Uniform Mobile Content Scale Values Render Black Screen when Launching to Mobile Device
UE - Platform - Mobile - Mar 3, 2015When attempting to set the configuration for mobile devices within the Engine/Config/DefaultDeviceProfiles.ini, any value that is non-uniform like 1.2 or 1.6 will render a black screen after deployi ...
GPU Particle Collision changes based on Normal Intensity on Colliding Surface
UE - Graphics Features - Jun 18, 2015Increasing the intensity of a Normal Texture on a colliding surface will cause the collision of GPU particles to behave strangely, looks to be falling through floor, when you are using a Constant Ac ...
Actor instance FComponentReference to other actor instance gets nulled on other actor recompile
UE - Gameplay - Blueprint Compiler - May 21, 2024An editable FComponentReference property on an actor instance can be used to reference another actor's component in the scene. In 4.27 and earlier versions these references were retained when the ot ...
Extremely far out zoom creates jagged lines where meshes overlap.
UE - Graphics Features - Jul 17, 2015I created a very large static mesh and then put a basic floor underneath it withe the bottom of the mesh overlapping the floor. I then created a camera 250,000 cm out from the mesh and zoomed in usi ...
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 ...
Crash occurs when selecting Reset this Property to Default Value in the Class Settings of a new Child Animation Blueprint
UE - Anim - Runtime - Anim Blueprints - Oct 26, 2022This is a Regression. Tested in //UE5/Release-5.0 CL20979098 - "None" is not an option for the parent class and the "Reset this Property" is not initially there. Crash occurs when selecting Reset t ...