Unreal Engine Issues
Unreal Engine Issues
Niagara GPU Distance Field collision uses only the first view in split-screen, causing collision to drop out for other players when view 0 loses Global DF coverage
UE - Niagara - Feb 17, 2026In split-screen, Niagara GPU Distance Field collision appears to be evaluated against only the first view passed into the Niagara GPU sim (view index 0), rather than per split-screen view. Because G ...
Directly opening a modified map asset of a streaming sublevel does not always force it to be reloaded (inconsistent with other map open behaviors)
UE - World Creation - Worldbuilding Tools - Feb 10, 2026When the level currently being edited has unsaved changes and the user opens a new one, the Editor asks if the changes should be saved. If the user answers negatively, the level asset is reverted to ...
Crash when removing and re-adding instances to an InstancedStaticMeshComponent with PerInstanceCustomData.
UE - World Creation - Worldbuilding Tools - Jan 22, 2026When using an InstancedStaticMeshComponent with PerInstanceCustomData, the number of float elements in the "Custom Data" array should always be equal to NumCustomDataFloats multiplied by the number ...
NDC Sorting Incorrect
UE - Niagara - Mar 12, 2026Using the new NDC BP nodes in 5.7 causes sorting to break; one system, regardless of world placement, is always drawn over the other. Even when the viewpoint puts the dominant system in the foregrou ...
JsonObjectToUStruct removes _ClassName from input FJsonObject, breaking repeated deserialization
UE - Core - Systems - Mar 18, 2026FJsonObjectConverter::JsonObjectToUStruct removes _ClassName from nested JSON objects during deserialization. Removing Obj->RemoveField(ObjectClassNameKey) from ConvertScalarJsonValueToFPropertyWit ...
Code Projects with Substance plugin enabled fail to convert from 4.10 to 4.11
Tools - Mar 30, 2016Converting a 4.10 project that includes the Substance Plugin to 4.11 will fail to compile. Workaround: Disabling / removing references to the plugin will allow the project to convert successfully. ...
UDP Messaging causes extra network traffic on some network setups
UE - Networking - Oct 7, 2015A few users are experiencing strange network traffic from UDP Messagine. They notice it on other devices connected to the network. In some setups, it can even cause you to have cable TV interrupti ...
Objects do not Scale relative to their Temporary Pivot Point (Alt+MMB Click)
Tools - Mar 19, 2015After temporarily moving the pivot point (Alt+Middle Mouse Click on the center of the translate tool), you can switch to scale. However, the object still scales from it's original (permanent) pivot ...
Expanding a folder in the Finder through the editor will crash the editor
UE - Platform - Apple - Mar 16, 2015Expanding a folder in the Finder through the editor will crash the editor. Reproduced in 4.7.2 binary on 10.9.5 Crash Report: [Link Removed] ...
Custom Component class does not show up in Add Component list
UE - Gameplay - Blueprint - Mar 5, 2015Creating a code component class and marking the UCLASS() macro with meta=(BlueprintSpawnableComponent) does not allow the component to be used inside blueprints. Workaround: Adding ClassGroup=( [Gr ...