Linux: crashes during crash handling

UE - Platform - Linux - Aug 9, 2016

It has been observed that crash handler can now corrupt memory during __cxa_demangle (from libc++). Repro steps listed here are just one of possible ways to trigger it, very similar crashes have bee ...

Instanced Static Mesh does not apply World Aligned Material correctly

UE - Graphics Features - Aug 22, 2016

If you apply a material that uses World Aligned Blend to an instanced static mesh, it will display differently than an non-instanced static mesh with identical settings. They only look identical if ...

Audio stops working when unplugging and replugging USB headset

UE - Audio - Jan 19, 2016

Game sounds can no longer be heard after unplugging and re-plugging back in a USB headset during a match. This also occurs when plugging a USB headset anytime during the course of the match. ...

File Media Source assets created via drag & drop have absolute instead of relative path

Media Framework - Sep 1, 2016

Notice that the saved FilePath is not relative, but contains the full path on the hard drive. When clicking into the FilePath property and then clicking somewhere else to lose focus on it, it will a ...

Auto-generated lightmap doesn't use some UV islands with the packed lightmap UV

UE - Graphics Features - Sep 20, 2016

Some faces from the UV0 for the texture UV are not used when repacking for the auto-generated Lightmap UV even if the faces are split and visible in the UV0. Attached example mesh. ...

ServerTravel command doesn't work in PIE using seamless travel

UE - Gameplay - Aug 19, 2015

The "servertravel" command doesn't function when running ShooterGame in Editor. A warning will show up in the Output Log: LogWorld:Warning: UWorld::ServerTravel: Seamless travel currently NOT supp ...

HISMC with LODs added as a Blueprint Component creates extra Material Elements

UE - Graphics Features - Oct 18, 2016

Adding a HISM as a component within blueprints and referencing a Static Mesh with LODs, creates extra/additional and material elements. ...

REGRESSION: HierarchicalInstancedStaticMeshComponent LOD transitions are broken in 4.9 and Main

UE - Graphics Features - Aug 24, 2015

While testing another fix I noticed HISM LOD transitions are not working in Main or 4.9 branch. There is no screen-door effect and multiple LODs seem to be rendering simultaneously compared to 4.8. ...

Splitting transform pins on add component nodes creates an additional transform pin when duplicated

UE - Gameplay - Blueprint - May 28, 2015

If an add component node is duplicated after the transform pin has been split, it will create an additional transform pin and keep the original split variables. ...

Crash opening projects from GitHub master branch

Tools - Sep 1, 2015

Trying to create/open projects in the current github master branch will quietly fail at 94% with no crash error or logs.UE4Editor-Core.dll!rml::internal::Block::findObjectSize() UE4Editor-Core.dll! ...