Fix primitive uniform buffer validation.

Rendering - RHI - Jul 31, 2020

GPUScene primitive validation is currently busted and asserts. It looks like there are two problems: 1) NaN's in the entries can cause comparison issues, so a MemCmp would be better. 2) There's a ...

Flickering artifacts are rendered when using Sky Atmosphere Component with Vulkan

Rendering - RHI - Jul 16, 2020

Rendering the SkyAtmopshere component using Vulkan with and without Vulkan (SM5) enabled causes artifacts to appear on screen on Windows and Linux.  This was reported and tested in 4.25.1 (CL-135 ...

Crash in D3DX12Residency::Internal::RemoveEntryList when travelling level

Rendering - RHI - Jul 13, 2020

The engine may touch freed memory at D3DX12Residency::Internal::RemoveEntryList. The memory release operation that is causing the problem is in FD3D12DynamicHeapAllocator::AllocUploadResource(). If ...

Background Geometry has thin holes when r.SeparateTranslucencyScreenPercentage is 50

Rendering - RHI - Jul 2, 2020

Edge artifacts appear when r.SeparateTranslucencyScreenPercentage=50. ...

DXC: IOS Half precision no longer supported

Rendering - RHI - Jun 9, 2020

(DX12) Groom simulation crashes GPU when viewport gets hidden and unhidden

Rendering - RHI - Jun 4, 2020

 Should be related to Groom hair simulation (doesn't crash if hair sim is disabled) Also attaching log files from licensee if that's helpful. ...

[CrashReport] UE4Editor-D3D12RHI!FD3D12Viewport::PresentChecked(int) [D3D12Viewport.cpp:567]

Rendering - RHI - May 6, 2020

Generated from CrashReporter ...

[CrashReport] UE4Editor-D3D11RHI!static void TerminateOnDeviceRemoved(HRESULT, struct ID3D11Device *) [D3D11Util.cpp:160]

Rendering - RHI - May 6, 2020

This ticket tracks instances of D3DHung crashes now that Aftermath has been enabled in 4.25.0.UE-74575 was marked fixed and closed with the enabling of Aftermath. ...

SSR Experimental Denoiser crashes when enabled using Vulkan

Rendering - RHI - Apr 27, 2020

Enabled the SSR Experimental Denoiser using Vulkan causes the Engine to crash. This crash does not happen with DX11 or DX12. This happens on Linux and Windows (-vulkan). This was reported and teste ...

macOS Rendering Artifacts on Intel Graphics

Rendering - RHI - Apr 9, 2020

https://udn.unrealengine.com/questions/568577/macos-rendering-artifacts-on-intel-graphics.html ...