Can you make build for 5.1.1 ?
I have updated the original post to 5.1.1 as well
’s GPULightmass - Development / Rendering - Epic Developer Community Forums (unrealengine.com)
Remember this is all experimental and not for production.
Also see the update needed for your Nvidia drivers
Epic’s GPUlightmass - Development / Rendering - Epic Developer Community Forums (unrealengine.com)
IMPORTANT
When using the GPUlightmass 5.1 code with 5.1.1 BINARY
the follwing needs to be added at the bottom of
C:\Program Files\Epic Games\UE_5.1\Engine\Config
BaseLightmass.ini
Using Notepad
[DevOptions.GPULightmass]
NumPrimaryGISamples=32
NumSecondaryGISamples=16
FireflyClampingThreshold=1000.0
If you dont do this 5.1.1 will crash possibly with an obscure error
Fatal error: A required key was missing from BaseLightmass.ini. This can happen if BaseLightmass.ini is overwritten with an old version.
GConfig->GetInt(TEXT("DevOptions.GPULightmass"), TEXT("NumPrimaryGISamples"), Scene.GPULightmassSettings.NumPrimaryGISamples, GLightmassIni) failed
at C:\Engine\Source\Editor\UnrealEd\Private\Lightmass\Lightmass.cpp:2481
I have problem when using the 5.1 GPU code on 5.1.1 BINARY as well. I CANNOT make this addition to the original 5.1 code file, because I dont own/support the code