Precomputed AO Masks cannot be used to LERP between Normal Maps

UE - Graphics Features - Sep 18, 2015

When using the Precomputed AO Map node to LERP between 2 Normals, only the A input into LERP will render out on the mesh. The Precomputed AO will work fine for Base Color LERPs Example: [Image Re ...

Child component that is not simulating physics returns true value with IsSimulatingPhysics node

UE - Gameplay - Feb 2, 2016

Child component that is not simulating physics returns true value with IsSimulatingPhysics node User Description: "Is Simulating Physics" bp node will return true for any child component if root/p ...

BSP brushes get Clipped or Disappear relative to the Surface Normals of a nearby Brush when Deleting/Flipping Faces

UE - LD & Modeling - Modeling Tools - BSP - May 1, 2017

While testing this issue it was interesting to discover how the surrounding BSP's were affected. They seemed to clip/disappear according to the surface normals of the deleted brushes. There is a si ...

Depth Fade Particles are not rendered on iOS when Mobile HDR disabled

UE - Graphics Features - May 7, 2015

Depth Fade and Fresnel inputs in a Particle's Material will result in the particle not rendering unless Mobile HDR is checked true on an iOS device. Also Reproduced in Main Promotable-CL-2535351 S ...

Thare are some case in which KeepState doesn't work propely if level sequence have multiple Shot and Transform Tracks

UE - Anim - Sequencer - Feb 16, 2021

if fulfilling following conditions, KeepState setting of transform track doesn't work.level sequence have 3 or more shot have camera track and actor track have transform tracktransform track of acto ...

Tabbing out of editor while dragging a folder leaves it in drag state when returning to editor

Tools - Aug 4, 2016

Had found the folder was stuck in this state, and eventually figured out it came from tabbing in and out looking for other info. Edit: We should probably cancel whatever drag is in progress if som ...

Sequencer - Pressing Add Key on Rotation-Yaw increases the key value exponentially

UE - Anim - Sequencer - Apr 24, 2019

Not a critical bug but add unnecessary workload since the user found himself constantly checking Yaw values. ...

Landscape Distance Fields artifacts when using DX12

UE - Graphics Features - Apr 13, 2021

This problem was reported in this UDN:https://udn.unrealengine.com/s/question/0D52L00005PbEYNSA3/landscape-distance-fields-artifacts?fromCase=1 ...

Volumes with infinite or missing faces when importing .fbx file

UE - Graphics Tools - Modeling Tools - BSP - Sep 16, 2024

UDN Description: We are having issues with the "Create Blocking Volume" tool on StaticMeshActors. When we create a convex blocking volume (any convex, rough or heavy), we often have volumes that ha ...

Editor crashes when creating a new level while the current level contains an Actor with an Actor Sequence Component

UE - Anim - Sequencer - Jan 5, 2022

This is not a regression. Tested in: //UE5/Main CL18218925 Binary - Crashed //UE5/Release-5.0 CL16682836 Binary - Crashed //UE4/Release-4.27 CL Binary - Crashed Having a level open that contains a ...