Reflection looks much darker on Mobile Preview vs PC

Platform - Mobile - Jan 13, 2021

This problem is getting more obvious while Roughness value is getting bigger, 1 get maxmum difference If surface has Normalmap applyed, because of this problem, bumpness effect is weaker on Mobile ...

Setting Texture Object within Niagara fails to update texture

Rendering - Niagara - Jan 11, 2021

Based off of a saleforce ticket, it seems that reinitializing a niagara system with an updated texture, the texture does not update. The setup works correctly in 4.25, so marking as a regression. ...

Crash when changing to Mesh LOD Coloration view mode with Paper2D sprites

Rendering - Jan 11, 2021

Crash in the editor when changing the view mode. This occurs because of a nullptr dereference of "InMaterialInterface" in the FDebugViewModeMaterialProxy constructor (Line 32 in DebugViewModeMateri ...

Data validation FAILED due to IWBE_Blutility containing invalid data

Docs - Samples - Jan 11, 2021

4.26[AssetLog] D:\Binary\UE_4.26\Engine\Content\Tutorial\InWorldBlueprintEditing\TutorialAssets\IWBE_Blutility.uasset: Default__IWBE_Blutility_C is not valid. See the MapCheck log messages for detai ...

Vulkan RHI when execute the node "Create Render Target 2D" when enabling the option "AutoGenerate Mip Maps"

Rendering - RHI - Jan 11, 2021

Unreal Crash in with Vulkan RHI when execute the node "Create Render Target 2D" with the option "AutoGenerate Mip Maps" then execute "Draw Material to Render Target" Opening the project also opens ...

[CrashReport] libUE4Editor-ApplicationCore.so!X11_SetWindowPosition [SDL_x11window.c:863]

Platform - Linux - Jan 11, 2021

Generated from CrashReporter ...

'Force Volumetric' property broken on instanced foliage

Tools - Foliage - Jan 11, 2021

Regular static meshes work expectedly with Force Volumetric however instanced static meshes do not. ...

Spawnable templates can reference other spawnables and their levels in a sequence

Anim - Sequencer - Jan 8, 2021

Spawnable templates can reference other spawnables. These references will be unstable due to the nature of spawnables, and the level reference can lead to unexpected behavior.  ...

DateTime Variable in Sub Widget resets on Compile

Tools - UMG - Jan 7, 2021

When attempting to set the default value of a date time in a sub widget the changes are not kept after compiling. ...