Summary
Previews in Material Nodes (e.g. TextureSampleParameter2D) are always black when Substrate is enabled. When Substrate is disabled, the previews show up as expected. This was tested with Unreal Engine 5.6 (from the Epic Games Launcher) using ContentExamples where Substrate Materials are very well showcased.
Please select what you are reporting on:
Creative
What Type of Bug are you experiencing?
Assets
Steps to Reproduce
Open ContentExamples Project (or any other which uses Substrate Materials)
Enable Substrate (Restart Unreal Editor if requested)
Open any Material (e.g. 3ColorBlend)
Expected Result
Previews in Material Nodes
Observed Result
Previewing the Node in the Preview Window (usually top left corner) works. But the Preview in each Material Node (e.g. InputAlpha (Scalar) is black.
Platform(s)
Windows (Latest)
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Additional Notes
Raytracing, Nanite, Substrate is enabled. SM6, DirectX12.
Following Logs may be relevant:
LogObj: Display: Attempting to load config data for Default__SlateThemeManager before the Class has been constructed/registered/linked (likely during module loading or early startup). This will result in the load silently failing and should be fixed.
LogWindows: Failed to load ‘WinPixGpuCapturer.dll’ (GetLastError=126)
PixWinPlugin: PIX capture plugin failed to initialize! Check that the process is launched from PIX.
LogSlateStyle: Warning: Missing Resource from ‘CoreStyle’ Style: ‘Unable to find Color ‘DefaultForeground’.’
LogD3D12RHI: Creating RTPSO with 217 shaders (0 cached, 16 new) took 13.12 ms. Compile time 10.85 ms, link time 2.23 ms.
LogRenderer: Using fallback RTPSO
LogSlate: External Image Picker: DecompressImage failed