LODBias causes landscape component to stop rendering if set >0 and Forced LOD set to -1

UE - LD & Modeling - Terrain - Landscape - Sep 12, 2016

LODBias causes landscape component to stop rendering if set >0 and Forced LOD set to -1. NOTE If Forced LOD is set to 0, the component renders correctly. ...

Meshes made with the Pivot Painter tool don't work correctly on OpenGL ES3.1 + AEP

UE - Platform - Mobile - Dec 1, 2015

In the project attached in original UDN post (too big to attach here) there is a tree that was created with the pivot painter tool that is animated. In the editor it behaves correctly, but trying t ...

Enable Collision checkbox does not affect static meshes from static mesh editor when set to false

Tools - Nov 24, 2015

Setting the Enable Collision checkbox to false in the static mesh editor does not alter collision on static mesh objects. ...

Spin Box delta does not appear to affect how the spin box increments through its values when clicking and dragging with the mouse

UE - Editor - UI Systems - May 12, 2017

Spin Box delta does not appear to affect how the spin box increments through its values when clicking and dragging with the mouse. The spin box appears to increment/decrement by more or less dependi ...

Changing preview mesh appears to affect initial transforms of all control rigs in level viewport

UE - Anim - Rigging - Control Rig - Apr 16, 2024

It seems that switching the preview mesh in the control rig editor is affecting the initial transforms in the hiearchies of related control rigs in the level viewport.  This seems to be due to the c ...

Migration from 4.12.5 to 4.13 can result in Blueprint functions losing input/ouput variables

UE - Gameplay - Blueprint - Sep 5, 2016

When migrating project from 4.12.5 to 4.13, Blueprint functions can lose input/output variable links. ...

Shader Complexity does not function properly with Android ES2 or ES3.1 set as the Preview Rendering level

UE - Platform - Mobile - Feb 25, 2019

A user has reported that Shader Complexity is not working properly in 4.21 with the Android ES2 or 3.1 preview rendering level settings. Regression?: No It did not look this way in 4.21 and prior v ...

ResavePackages commandlet (buildlighting) fails/asserts on reflection captures in non-visible sub-levels

UE - Graphics Features - May 13, 2025

When building reflection captures through the ResavePackages commandlet, it frequently triggers an ensure inside of ReflectionEnvironmentCapture.cpp. If distributed shader builds start causing prob ...

Niagara - When Interpolated Spawning is disabled, the first frame of each particle unexpectedly does not take into account the Particle Update stage

UE - Niagara - Feb 28, 2025

Foreword: Even if the behavior described here is by design, it is rarely (if ever) expected or desired. This was discussed and agreed to be treated as a bug. Explanation below. When interpolated sp ...

Post process in Right eye misaligned on PSVR when using vr.PixelDensity greater then 1

UE - Platform - XR - Sep 5, 2019

When changing the pixel density for PSVR it appears that some post processes shift slightly in the Right eye ...