Unreal Engine Issues
Unreal Engine Issues
SpeedTree Material No Longer Compiles With Texture Coordinate Node In BaseColor
UE - Graphics Features - Jan 25, 2017If you open a material with the speedtree node plugged into WPO and then use a texture coordinate(index of 2) in base color the material will no longer compile properly. The full error is "Error [ ...
Foliage meshes do not appear in high res screenshots after certain amount
UE - World Creation - Worldbuilding Tools - Foliage - Aug 24, 2017When using the Engine's High Res Screenshot tool, there is a limit on the amount of foliage that can be present before the meshes stop appearing. This number is around 1500 meshes, though I was not ...
[CrashReport] ULevel::GetWorldSettings - UStaticMeshThumbnailRenderer::Draw
Tools - Oct 30, 2017This is a common crash that has occurred since at least 4.14. The callstack is nearly identical to [Link Removed], which appears to be fixed in 4.18; and [Link Removed], which has not. The differen ...
Importing FBX creates new materials when using the search materials import setting
UE - Editor - Content Pipeline - Import and Export - Nov 1, 2017There is an issue when importing FBX that creates new materials when using the search materials import setting. Instead of being able to use the material that is in the Base Material name, the textu ...
Android devices are not opening video source files
UE - Platform - Mobile - Jan 10, 2018There is an issue when packaging and launching onto an andorid device in version 4.18 where Android devices are not opening video source files, playing the level on the device shows only a black scr ...
Volumetric fog does play nice with dynamic res
UE - Graphics Features - Jan 4, 2019Dynamic resolution dynamically changes the the size of the viewport in render targets. The thing is when the resolution changes: it is reprojecting previous frame that is stored in history render ta ...
Asset localization does not work properly for Paper2D related assets such as Flipbook
UE - Foundation - Mar 18, 2022This issue is resolved by changing Paper2D's LoadingPhase to PostConfigInit, but this is a workaround. We suggest a better long term fix via AssetRegistry changes (see comments). In the default la ...
Pose watches don't display correctly with compatible skeletons
UE - Anim - Runtime - Anim Blueprints - Aug 19, 2022"Hello, we've found a quirk with ABP's pose watch and compatible skeletons. Same setup as above. We have skeleton A as the base and skeleton B as a compatible skeleton. They both share similar hiera ...
Iris - large fast arrays serialize multiple elements when only one is dirtied
UE - Networking - Iris - Apr 8, 2025This seems to be a result of how the changemask is handled for fast arrays. Because the changemask is a fixed set of bits (defined by IrisFastArrayChangeMaskBits), a single bit can represent multipl ...
Hot reload does not update Enum entries
UE - Gameplay - Blueprint - Oct 13, 2015Performing a hot reload after updating an Enum will not reflect the update until the editor is closed/reopened. UPDATE (8/23/17): Restarting the editor dose not immediately update the enum. When ...