How to enable Directx12 on 4.12

Development Rendering
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1

I’ve seen this question How to enable DirectX 12 on UE4.11 - Programming & Scripting - Unreal Engine Forums
and this forum thread How to active DirectX 12? - Community & Industry Discussion - Unreal Engine Forums .

So I tried to add -DX12 and -dx12 to a shortcut (and also in the command line) both to a project and to the editor.

However the MSI GamingApp utility of my graphic card says that Unreal is running DirectX 11. Also, when I call Play in Editor, it says PCD3D SM5.
So I think that the editor is not running on DirectX 12.

Am I wrong?

Aslo, is there a way to check if the editor is running on DirectX12 from within Unreal?

How do I activate DirectX12 ?

2

Hi Darius,

Take a look at my post here and the very last part of my answer at the very bottom. There is a picture with the Output Log that should indicate what you need to look for to see if you’re running DX12.

It’s been a while since I’ve used DX12, so this might have changed, but this is one way to know you’re using DX12 currently.

I hope this helps.

Tim

3

Hi Tim, thank you!

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I’ve been looking for it for a long time.
open UE4 settings，and project setting，keyword"RHI”，you will find default RHI change DirectX 12.
and open Engine - Rendering Rat Tracing.
dont forget update your window and nvidia driver.
I hope it will help you

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