Unreal Engine Issues
Unreal Engine Issues
Material Instance Parameter Values Reset When Renamed
UE - Rendering - Architecture - Materials - Nov 27, 2017Per Licensee: We would like to change some of their parameter names, however when renaming a parameter, its value in all of the corresponding material instances resets to the base material default ...
When using 'Is Hidden Ed' it behaves similar to 'Is Hidden Ed at Startup'
UE - Gameplay - Jan 11, 2018The tool tip for 'Is Hidden Ed' states "Returns true if the actor is hidden in the editor viewports" but it only actually flags true if "Hide Selected at Startup" is selected for the actor. Therefor ...
Macbook Pro touchpad two finger click and drag does not rotate the viewport camera
Docs - Mar 14, 2018Using 2 Finger Click + Drag to rotate the Viewport camera does not provide the behavior that is described in the documentation. Instead of rotating the camera in place as the documentation describe ...
Collision preset setting is not reflected correctly in case of original class inheriting Primitive Component
UE - Simulation - Physics - Aug 15, 2018Collision preset setting is not reflected correctly in case of original class inheriting Primitive Component. Probably the cause is UPrimitiveComponent :: PostLoad (). Since FCollisionResponse :: U ...
SingleLayerWater with PixelDepthOffset gives wrong refraction
UE - LD & Modeling - Terrain - Water - Oct 29, 2020We can see refraction gets distorted after we have a bigger PDO value, and it's not because the depth is more shallow, but looks like some kind of scene color texture lookup error. Also, not sure i ...
Dynamic (transient) material instance assignment lost if object spawnable
UE - Anim - Sequencer - Jun 21, 2024Material Instance Dynamic assigned to Spawnable objects with Editor Utility Widget get reverted when hit the Save button in Sequencer. This appears to come from the Material Instance Dynamic not be ...
Logic error in TRange::Difference causes crash when you Trim and Preserve Left/Right and unbounded Attach section in the sequencer
UE - Anim - Sequencer - Aug 1, 2024TRange::Difference function does not handle bounds correctly, causes crash in the sequencer when "Trim And Preserve Left/Right" is used in the user's example project. User provided a potential fix: ...
5.5.3 insights crashes when opening .utrace files with "RenderCommands,RDG,RHICommands" channels.
UE - Foundation - Insights - Feb 19, 2025The customer provided reproduction steps and a trace file that crashes Insights. From the customer: manually placing if (!CurrentGraph) Unknown macro: { return; } nullchecks in RenderGraphInsi ...
Editor freezes then crashes while attempting to save during PIE
UE - Gameplay - Blueprint - Jun 8, 2015A level blueprint that has blueprint functions on keybound events freezes and crashes when in PIE and save is pressed. Frequency: 7/7 Crashreporter: [Link Removed] Note: If all level blueprint n ...
AIController.BrainComponent not being set to user-created BehaviorTreeComponent instance
UE - AI - Apr 30, 2015If a user manually created a UBehaviorTreeComponent for his custom AI controller, but forgets to set AIController.BrainComponent to point at that BT component then a fair amount of assumptions break ...