https://learn.microsoft.com/en-us/windows/win32/api/d3d10/nf-d3d10-id3d10device-omsetblendstate
ID3D10Device::OMSetBlendState (d3d10.h) - Win32 apps | Microsoft Learn
Set the blend state of the output-merger stage. (ID3D10Device.OMSetBlendState)
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