Linear interpolation occurs on constant tangent curve partially

UE - Anim - Runtime - Feb 17, 2025

When using UV scrolling for a flipbook-like animation in Animation Sequence, creating keys with "Constant Tangent" settings on Curve Editor does not result in an instantaneous change to the specifie ...

Attach actor to actor with the transform set to snap to appears to offset when calling it multiple times on multiple actors

UE - Gameplay - Blueprint - Dec 13, 2016

Attach actor to actor with the transform set to "snap to" appears to offset when calling it multiple times on multiple actors. ...

[AI] Fill Collision Underneath for Navmesh does not work for ISM instances

UE - AI - Navigation - Sep 29, 2023

Although the ISM component allows for enabling the flag for Fill Collision Underneath for Navmesh, it does not add the modifier for this to the navigation data for its instances.  ...

Setting "Is Enabled" via the animation timeline in UMG does not appear to work at runtime

UE - Editor - UI Systems - Jun 10, 2016

Setting "Is Enabled" via the animation timeline in UMG does not appear to work at runtime ...

ChildActorComponent (SkeletalMesh) goes into tpose when calling SetChildActorClass

OLD - Anim - Mar 19, 2018

There is an issue occurring where when updating an animation of a child actor by setting the Child actor class, the animation will flash the skeleton in a T-Pose before continuing with the animation ...

ShaderCacheTool build fails

UE - Graphics Features - Oct 25, 2017

In 4.18 and 4.19, it is no longer possible to build the ShaderCacheTool. REGRESSION: Yes. The ShaderCacheTool builds successfully in 4.17.2. It looks like the missing MergeShaderCacheFiles property ...

CLONE - ShaderCacheTool build fails

UE - Graphics Features - Nov 20, 2017

In 4.18 and 4.19, it is no longer possible to build the ShaderCacheTool. REGRESSION: Yes. The ShaderCacheTool builds successfully in 4.17.2. It looks like the missing MergeShaderCacheFiles property ...

Particles: SetFloatParameter not always having an effect

UE - Graphics Features - Oct 7, 2015

A licensee is trying to use Distribution Float Particle Parameters for the Noise properties of a Beam Particle. When trying to change these parameters in a Blueprint, some work, others don't. When ...

Grandchildren of UDataAsset are not properly registered by the Asset Manager

UE - Gameplay - Sep 19, 2017

Any child class of UDataAsset (parent) will properly be picked up when the Asset Manager's Asset Base Class" field is set to the appropriate class. However a grandchild class (Child) with the same ...

Decal Fading parameters are completely broken

UE - Graphics Features - Sep 20, 2020