Unreal Engine Issues
Unreal Engine Issues
FAnimUpdateRateParameters::GetInterpolationAlpha appears to be returning an invalid value for TrailMode
UE - Anim - Aug 5, 2023It appears that FAnimUpdateRateParameters::GetInterpolationAlpha is not returning a sensible value when running in TrailMode. Currently the only variable in the calculation is EvaluationRate which ...
Crash when creating new projects or converting copies of old ones in Japanese
UE - Editor - UI Systems - Slate - Dec 4, 2014There's a crash in FCharacterList::GetKerning() when using the editor in Japanese that is apparently fixed in one of these three changelists: CL# 2370014, 2370050, and 2370040 But they were not ...
Blueprint 'Select' node: nodes connect to all input pins are evaluated while only one input is needed
UE - Gameplay - Blueprint - Aug 15, 2015Originally marked Won't Fix in 2017. Issue reopened on May 1, 2024. All inputs of a Select blueprint node are evaluated, even though in the end only one value is selected. This is wasteful work. ...
Replace Reference feature is not replacing textures with new selected texture
Tools - Jan 4, 2017Workaround:Open M_TableRound, move a node. Save the MaterialReopening the project seems to fix the issue Replacing the reference of the deleted table texture is rendering default material. Note T ...
CCD can produce incorrect results at low frame rates
UE - Simulation - Physics - Feb 27, 2019The attached project has a fixed frame rate of 30fps with a simulating CCD cube above a with a full restitution floor. The cube has an odd rotation, such that it impacts the floor at a single point ...
Animation Blueprint Classes are Uncastable
OLD - Anim - Aug 13, 2019It appears that the Anim Instance class is no longer accessible. As a result, no animation blueprints made are accessible via blueprints - regardless of whether or not the skeletal mesh actually use ...
FBX imported skeletal mesh has incorrect axis directions
UE - Editor - Content Pipeline - Import and Export - Aug 20, 2019The axis the FBX is imported with has been inversed from prior versions. See attached screenshots. This causes issues specifically with vehicles, where the movement is happening into the forward dir ...
Rect lights cause visual noise on the light rendered when using raytracing
UE - Graphics Features - Lumen - Nov 12, 2019Rect lights cause visual noise on the light rendered when using raytracing. It is easier to see when you get rid of all other light sources in the scene. I have attached an example project. This se ...
Undo and ConstructionScript break the AttachChildren array
UE - Gameplay - Components - Nov 14, 2019Undo fills AttachChildren array with null by the undo serializer. After that, a construction script tries to remove child components from parent component's AttachChildren but it can't find its poi ...
TMap Contains Node Returns False Incorrectly Under Specific Circumstances
Tools - Nov 20, 2019The Contains node doesn't return an existing row from a data table under specific circumstances. This didn't occur when the struct the data table is based on was made via blueprints or there are mor ...