Unreal Engine Issues

Crash when reopening a project that has a Child Actor component in a BP with a WaterBody class set as the Parent Class

When adding a child actor component to a Blueprint with the Parent Class set to one of the new Water classes and then placing it in the world, the project will crash on open. This was tested with th ...

Gazing at decal material containing Texture_Bombing_POM causes the editor to crash

UCanvasRenderTarget2D crashes on some video cards if the BGRA format is selected

The reason for the crash is that the underlying resource uses DXGI_FORMAT_B8G8R8A8_TYPELESS, and UAV support for that format is optional. UCanvasRenderTarget2D sets bCanCreateUAV to true always, wit ...

Nvidia Graphics Drivers cause editor menus to flicker and disappear after using the editor for an extended period of time

This issue seems to be occurring on a variety of Nvidia cards. So far, I haven't seen any indication that it is affecting AMD graphics cards. The majority of the reports have indicating that the pro ...

Crash when adding a Material Layer with a Static Component Mask Parameter node to a Material Instance

When adding a Material Layer, that has a Static Component Mask Parameter node in it, to a Material Instance, the editor will crash.   The ability to set Material Attribute layers in a Material Inst ...

Virtual Texture not available in the Material Domain settings of a Material

Virtual Texture is not available as an option for the Material Domain. Even if Virtual Texture support is enabled in the project settings. Tested in //UE4/Release-4.25 @ CL 14469661 and this did ...

Landscape Distance Fields artifacts when using DX12

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

Incorrect AO rendering when that using SSGI.HalfRes

This problem seems to have started from 4.26. Also, setting r.DiffuseIndirect.Denoiser=0 will increase the noise but invisible the rendering in problem. ...

Ensure condition failed : loading sublevels containing reflection captures, UpdateAllReflectionCaptures may be called twice

If sublevels containing multiple reflection captures are loaded in consecutive ticks and the execution timing of UpdateMaxCubemaps on rendering thread is delayed, UpdateAllReflectionCaptures will be ...

Crash when adding a Material Layer with a MaterialFunctionCall node to a Material Instance

Adding a Material Layer to a Material Instance that has a Material Function Call node connected to the Set Material Attributes node causes the editor to crash. I tested a Material Layer without the ...