HTML5 cannot package on Windows 10

UE - Platform - Mobile - Jul 29, 2016

HTML5 is not packaging or launching onto browsers in 4.12.5 on Win10 machines. ...

Mip Gen Blur Settings affecting Mip Level 0 when setting the Maximum Texture Size

UE - Graphics Features - Jul 7, 2017

When Blurring a Texture using Mip Gen Settings and setting the LOD Bias or Maximum Texture Size, the blur gets applied to the base Mip Level 0. This behavior is contrary to how it behaves when blur ...

Skeletal Meshes with Physics assets with less than 5 bodies will not use flag for Start Awake

UE - Simulation - Physics - Dec 8, 2015

When using a Physics Asset with 4 or less physics bodies the flag for Start Awake cannot be disabled, even if unchecked, when Simulate Physics is set to true. I've attached a project with assets f ...

'Max World Position Offset Displacement' causes culling issue on HISMC/foliage in 5.4

UE - Rendering - Architecture - Materials - Jul 9, 2024

Foliage/hierarchical instanced static mesh components have issues with culling when their material's "Max World Position Offset Displacement" value is a higher amount, e.g. 100.0. ...

Landscape Mountains Content Is Bugged When Updating Engine Version (P_BirdsClose_Circling)

UE - Graphics Features - Sep 30, 2016

When updating the P_BirdsClose_Circling to a new engine version (4.12.5 or higher) the particle system breaks. ...

XR -ARKit - Tracked Planes are not attached to the real world objects when moving the camera around

UE - Platform - XR - May 22, 2024

When the user attempts to place an object on a tracked plane it slides around the environment not staying in the expected place. Using the ARDebugcheck project with the show planes option you can se ...

Translucent Dbuffer Decals not Rendering in Material Editor Preview Window

UE - Rendering - Architecture - Materials - Sep 30, 2016

Dbuffer decals with a Translucent Blend Mode are not rendering in the preview window of the Material Editor. Note I noticed the Default Blend Mode for Dbuffer Decals is set to Translucent now inste ...

Map placed actor binding to another actor's Event Dispatcher (multicast delegate) results in duplicate bindings after blueprint recompile

UE - Framework - Blueprint - Apr 17, 2025

Context Blueprint actors placed on the map can bind to another actor's event. If an ActorB has a reference to ActorA, it can bind to an event dispatcher in A by creating an event node in ActorB's e ...

Adding ProceduralMeshComponent Class to a project prevents the code from compiling

UE - Gameplay - Aug 5, 2016

After adding a classed based on ProceduralMeshComponent the code for the project does not compile any longer. **This is a Regression - Adding ProceduralMeshComponent class would compile successfull ...

Decals custom depth/stencil side effect from Lumen

UE - Graphics Features - Oct 15, 2024

The order of passes related to Decal rendering (without the DBuffer) and CustomDepth is changed by the CVar "r.Lumen.AsyncCompute", even when Lumen is not enabled. This causes Decal Materials that ...