Unreal Engine Issues
Unreal Engine Issues
Enabling Strip Source Data On Cook on Geometry Collection is also stripping the Anchor flag of cooked assets
UE - Simulation - Physics - Jul 20, 2025Enabling Strip Source Data On Cook on Geometry Collection (GC) is also stripping the Anchor flag of cooked assets. The licensee has reported that once they do a build the Anchors disappear and GCs t ...
Spherecast against complex geometry is returning odd results
UE - Simulation - Physics - Sep 19, 2023Turning on batching of sphere casts when colliding against complex gives incorrect results. Affects debug output and vehicle wheels and body movement. The issue is with the batch query mode which ...
Starting position of physics simulated bp is different in Standalone Game
UE - Simulation - Physics - Feb 26, 2016Starting position of physics simulated bp is different in Standalone Game User Description: Things work fine in the editor window, but when I run a standalone game then blueprints with physics bod ...
Tick functions are skipped on the first frame in package build and standalone PIE
UE - Gameplay - May 19, 2025It's reported that all Tick functions are skipped on the first frame when running in packaged builds and standalone PIE. This is because both TickVisitedGFrameCounter and GFrameCounter are initializ ...
Starter Content's "P_Explosion" does not successfully convert to a Niagara System - incorrect loop, spawn, sprite size, and collision behaviors
UE - Niagara - Cascade - Mar 17, 2022Starter Content's "P_Explosion" does not successfully convert to a Niagara System - incorrect loop, spawn, sprite size, and collision behaviors Changes needed for / issues found with each emitter:A ...
Physics Constraints do not have the same values if they are part of an 'Always Loaded' level
UE - Gameplay - Dec 3, 2014Physics Constraints do not have the same values if they are part of an 'Always Loaded' level. They will work correctly in the Persistent level and a level that is Streamed in. This becomes problem ...
FMultiReaderSingleWriterGT isn't thread safe
UE - Foundation - Core - May 17, 2016From https://udn.unrealengine.com/questions/292741/fmultireadersinglewritergt-isnt-thread-safe.html: I've found that FMultiReaderSingleWriterGT has at least 2 bugs: The one that caused a deadlock ...
Planar Reflections Not Behaving As Expected in Splitscreen
UE - Graphics Features - Dec 19, 2018This occurs in //UE4/Main @ CL 4670176 Not a Regression. This is similar to https://jira.it.epicgames.net/browse/UE-59149 but when adding more player characters it seems to change the planar reflec ...
Object Scale Not Working with Instanced Static Mesh
UE - Graphics Features - May 19, 2016Using Object Scale in your material with an Instanced Static Mesh does not change the color of the material if you scale the individual instances of the Instanced Static Mesh component. If you scal ...
Dark square appears in hair in direction of spotlight when shadows disabled
UE - Graphics Features - Sep 18, 2024A dark square appears in the direction of a spotlight on hair when the spotlight has no shadow. [Image Removed] In UE 5.4 the dark square is visible when the spotlight has no shadow, and a light s ...