Editor Crashes when Isolating a Material Element on Skeletal Meshes with Ray Tracing Enabled

UE - Graphics Features - Lumen - Jul 3, 2019

With ray tracing turned on, clicking on the isolate material option next to a material slot on a skeletal mesh with more than one material slot, causes the editor to crash. Found in 4.22 CL# 7053647 ...

Internal Compile error received from rearranging Format Text nodes

UE - Gameplay - Blueprint - Dec 18, 2014

Internal Compile error received from rearranging Format Text nodes Output Log of Error: LogBlueprint:Error: [compiler] Error Internal compiler error inside CreateExecutionSchedule (site 2); please ...

Fullscreen Editor Crash when setting both IndexBuffers to False

UE - Graphics Features - Jul 22, 2019

When setting both IndexBuffers to False the Editor will crash when attempting to use Fullscreen mode with F11. ...

Crash in VehicleGame Standalone game when attempting to drive

UE - Graphics Features - Oct 6, 2016

This was on an Nvidia Macbook Pro. Doesnt crash on an AMD iMac. ...

Switching raytracing console variable in runtime can crash engine.

UE - Graphics Features - Lumen - May 13, 2020

Licensee reported that is caused by missing ECVF_RenderThreadSafe flag in these console variable definitions. r.RayTracing.Shadows r.RayTracing.AmbientOcclusion r.RayTracing.Reflections Here is a ...

Instanced static meshes fire an erroneous performance assert about loose parameters.

UE - Graphics Features - Sep 4, 2019

 "This ensure is intended to catch regressions where rendering programmers add a loose parameter to LocalVertexFactory, breaking dynamic instancing on regular static meshes.  InstancedStaticMeshes c ...

Crash occurs loading a sublevel containing landscape with ray tracing enabled

UE - LD & Modeling - Terrain - Landscape - May 13, 2020

In raytracing enabled, When loading a sublevel containing landscape with LoadStreamLevel function following error is shown. Assertion failed: Pair != nullptr [Link Removed] [Line: 584] Licensee re ...

Failed to launch project with -D3D10 Command Line Argument

UE - Graphics Features - Jun 3, 2019

Adding the d3d10 command line argument to a package project results in a crash. This worked normally in 4.21 and below.  ...

Editor crash when delete static mesh actor include in HLOD

UE - World Creation - Worldbuilding Tools - HLOD - Feb 18, 2021