Blueprint with instance static mesh from construction script will cause crash when using the build then build geometry

Tools - Mar 12, 2015

When using a BP with component instance static mesh that is added via the construction script, when using the build button in the toolbar to build lighitng and geometry everything will work correctl ...

Crash Occurs When Using Move Component To and Overlap Event

UE - Gameplay - Jan 29, 2016

When using move component to to move a component, and then calling Destroy Actor when the actor overlaps another actor, a crash occurs. In this case, the user was attempting to move their static m ...

Editor crash when shader debugging enabled including r.shaders.optimize=0

UE - Rendering Architecture - Shaders - Jun 23, 2024

The editor crashes when activating cvar options for shader compilation and debugging. ...

r.VolumetricRenderTarget.PreferAsyncCompute producing different visuals

UE - Graphics Features - Aug 2, 2024

When the cvar "r.VolumetricRenderTarget.PreferAsyncCompute" is enabled, it will cause Volumetric Clouds to ignore the influence of Volumetric Fog. In high-fog environments, this can cause the clouds ...

Compiling Blueprints breaks socketed attachments of actors attached to non-root components

UE - Gameplay - Blueprint - Oct 12, 2023

When blueprints are compiled, instances of those blueprints have their attachments detached and then reattached. Reattachments always occur on the RootComponent regardless of which component they we ...

Different Load Orders affect Shadows on Foliage & HISM

UE - World Creation - Worldbuilding Tools - Foliage - Mar 14, 2019

Different Load Orders affect Shadows on Foliage & HISM Discovered during verification of [Link Removed] Also created a Blueprint actor with a HISM and duplicated it three times and changed the mob ...

Lightmass Build Hanging at Specific Percentages

UE - Graphics Features - Sep 4, 2015

Lighting will build indefinitely in certain circumstances and can be verified in Swarm Agent that it will continue to process the maps even though the log shows it has completed. This is happening i ...

Lightmass Build Hanging at Specific Percentages

UE - Graphics Features - Sep 11, 2015

Lighting will build indefinitely in certain circumstances and can be verified in Swarm Agent that it will continue to process the maps even though the log shows it has completed. This is happening i ...

Material attribute layers issue with texture sample and VT lookups

UE - Rendering Architecture - Materials - Nov 14, 2024

When using material attribute layers in a material layer setup, there is a potential discrepancy in the number of VT Lookups presented in the material instance's Platform Stats. When the same textur ...

Cannot Increment a Blackboard Key Value

UE - Gameplay - Blueprint - Feb 4, 2016

Getting a blackboard value as int and then attempting to increment it does not actually increment the value. Upon attempting to increment a value that started at 0, the editor continued to print out ...