Unreal Engine Issues
Unreal Engine Issues
Copying and pasting a material function renders all of the duplicates inputs as not having default values
UE - Rendering Architecture - Materials - May 22, 2019The top material function was placed in a graph directly. The second was generating by copying the first node. Note that the input pins changed color which indicates that each input on the new modul ...
Send "Enter Key" is not working with press and release key in Web Browser plugin
Tools - Mar 3, 2020When trying to send the Enter Key to Web Browser using the Press and Release function, it does not work. This function works with any other key that you try to send. A repro project is attached tha ...
Landscape Grass disappears after sculpting a landscape with "Enable Edit Layers" on
UE - LD & Modeling - Terrain - Landscape - Apr 6, 2020The grass won't spawn after proper material being applied on the landscape. Even after being forced to be spawned (by reloading the level, for example) the grass will disappear again every time the ...
Vertex Interpolator causes depth-test to fail
UE - Graphics Features - Apr 23, 2020Vertex interpolator (semi-randomly) causes visual artifacts on meshes. This did not happen initially when using or creating this material function but started about 24 hours later but now happens st ...
Inversing the scale of a skeletal mesh when it's simulating physics results in the mesh and collision being flipped
UE - Simulation - Physics - Mar 18, 2021The attached project has 3 skeletal meshes. One with its original transform and then 2 copies with an inversed scale in the X axis for one and the Y axis for the other. When pressing play, the meshe ...
Linked Anim Layer node can become stuck in a single state when attempting to change the Layer
UE - Anim - Runtime - Anim Blueprints - Oct 25, 2022When swapping Layer settings between various Animation Layers on a Linked Anim Layer node, the node can become stuck in one state. The node will become stuck in the Linked Anim Layer state and canno ...
Blueprint debugger: variable getter node displays wrong object's value
UE - Framework - Blueprint Runtime - Jul 28, 2023After triggering a breakpoint in blueprint, variable getter nodes can display the value of a different object than the node's target. For example: if an actor class has a value MyBool and the bluepr ...
Keying Level Sequence Crashes Engine
UE - Anim - Sequencer - Dec 12, 2024Repro rate 3/5 Regression to be tested Testing with a fresh level sequence no crash occurs, Tried to do it without rekeying and did not get a crash. I repro'd it a few times and sometimes no crash ...
Niagara Data Interface "Errors and Warning" section on Module Details not updating when error messages change
UE - Niagara - Aug 14, 2025This is a regression: it worked correctly up to UE 5.5, but not in 5.6 or mainline latest. Possibly caused by CL 40093049. Class UNiagaraDataInterface provides virtual method GetFeedback(), which a ...
Packaged version of VR Template does not launch in stereo mode by default
UE - Platform - XR - Nov 14, 2016The VR Template in 4.14 had a node in the level blueprint to enable stereo mode at the start of the game, but it has been removed in 4.15: [Image Removed] Maybe the "console command" wasn't the be ...