Try it:
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git clone -b 4.18-Blast-Flex-Flow-HairWorks-HBAO-VXGI-WaveWorks https://github.com/Sevenplex/UnrealEngine.git
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git remote add simul https://github.com/simul/UnrealEngine.git ( If there is a TrueSky license https://simul.co/)
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git fetch --all
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git reset --hard
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git clean -fx -d
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git merge remotes/simul/4.18
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change file Engine/Source/Runtime/Renderer/Private/TranslucentRendering.cpp on [TranslucentRendering.zip](TranslucentRendering.zip (14.5 KB)&d=1518969052)
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Run Setup.bat
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Run Engine\Plugins\TrueSkyPlugin\GetBinaries.bat
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Run GenerateProjectFiles.bat -2015
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Open UE4 visual studio solution and build UE4 Developer Editor mode.