Unreal Engine Issues
Unreal Engine Issues
Spline Mesh Collision doesn't work in packaged game when spawning them at runtime
UE - Simulation - Physics - May 18, 2020Spline Mesh Components lose their collision in a packaged game when spawning them at runtime, or modifying them via 'Set Start and End' function at runtime. ...
Show Flags are changed to the state that they were set on editor startup when switching to a different level
UE - Graphics Features - Jun 15, 2018Show Flags are changed to the state that they were set on editor startup when switching to a different level It appears that the state of Show Flags are stored in the editor on shut down, this is c ...
Inconsistent media texture new style output state across the engine
UE - Media Framework - Jun 20, 2023A simple search for `NewStyleOutput = true` will reveal the many instances where this flag is already forced on, including media plates and media bundles. This however means that we have incompatib ...
Global SkyAtmosphere and Clouds Issues (Ambient Light)
UE - Graphics Features - Dec 3, 2024Ambient Light on Volumetric Clouds from Sky Atmosphere always is calculated as if the clouds are at the north pole of the planet. Using a sphere-shaped Sky Atmosphere and Volumetric Clouds causes t ...
Light Leak Issue in Modular Buildings (Lumen HZBTraversal)
UE - Graphics Features - Lumen - Oct 14, 2025Starting in Unreal Engine 5.6, disabling "r.Lumen.ScreenProbeGather.ScreenTraces.HZBTraversal" can lead to light leaking between adjacent or overlapping meshes. Also tested on Release-5.6, CL: 4523 ...
Class Defaults do not show Texture variables when called from other blueprints
UE - Gameplay - Blueprint - Sep 30, 2015If class defaults are accessed in an actor blueprint from another blueprint, texture variables will not appear in the class defaults list on the "Get Class Defaults" node. ...
Shadows cast from static meshes are not appearing on characters in Mobile Preview
UE - Graphics Features - Oct 24, 2014When placing a Static mesh into a level that will cast a shadow and building lighting, no shadow will be shown on a character when walking through its shadow ...
Skeletal Mesh with Tessellated Material causes Excessive Blur
UE - Graphics Features - Nov 18, 2014With a Tessellated Material, either Flat or PN Triangles, applied to a Skeletal Mesh when playing, the Mesh has excessive blur when in motion. If you use the same material and turn off tessellation ...
Packaging a plugin from Plugins Editor UI wipes the target folder before packaging
UE - Foundation - Cpp Tools - Plugin System - Sep 23, 2016"Package Plugin" from Plugin Editor UI will wipe the target folder’s contents first then populate it with plugin files. User was expecting “Package Project” like behavior: Create a new folder in th ...
Creating custom event from function w/ delegate variable parameter does not have input pin for the delegate
UE - Gameplay - Blueprint - May 29, 2015When using a delegate variable as a function parameter, dragging off of the delegate pin of an associated function BP node to create a custom event will create a default custom event without the inp ...