Unreal Engine Issues

UE-215358

Slate Post Buffer does not work correctly when changing Default Back Buffer Pixel Format

Slate Post Buffer does not work correctly when changing Default Back Buffer Pixel Format

UDN
Steps to Reproduce
  1. Open /Game/Maps/UI_SlatePostBuffer in Content Examples
  2. Play in PIE and go before each sample
  3. Add the following DefaultBackBufferPixelFormat setting to /Config/DefaultEngine.ini and restart the editor
[/Script/Engine.RendererSettings]
r.DefaultBackBufferPixelFormat=0

1.1 Simple Effect
r.DefaultBackBufferPixelFormat 4 works correctly
[Image Removed]
r.DefaultBackBufferPixelFormat 0 or 1 results in noise-like rendering
[Image Removed]
r.DefaultBackBufferPixelFormat 2 or 3 results in renders black
[Image Removed]

1.3  Wavy screen sample
r.DefaultBackBufferPixelFormat 4 works correctly
r.DefaultBackBufferPixelFormat 0, 1, 2, or 3 results in a crash
[Image Removed]

Callstack
LogD3D12RHI: Error: Interfaces.CopyCommandList->Close() failed 
 at D:\p4\release-5.4\Engine\Source\Runtime\D3D12RHI\Private\D3D12CommandList.cpp:283 
 with error E_INVALIDARG
LogWindows: Error: appError called: Fatal error: File:D:\p4\release-5.4\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp [Line: 1077] 
Interfaces.CopyCommandList->Close() failed 
 at D:\p4\release-5.4\Engine\Source\Runtime\D3D12RHI\Private\D3D12CommandList.cpp:283 
 with error E_INVALIDARG

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Fixed
ComponentUE - Editor - UI Systems - Slate
Affects Versions5.4
Target Fix5.5
Fix Commit34350317
CreatedMay 20, 2024
ResolvedJun 13, 2024
UpdatedJun 25, 2024
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