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1. Shadow acne, only in DirectX 11 mode

   

   Topic by lpcstr · Dec 2012 · Home› Unreal Engine

   So yeah. Why is it that my dynamic lights look passable in DX9 mode, but as soon as I switch over to DX11 everything looks like excrement? I'd really like to get this fixed. DX9: http://s20.postimage.org/7tk28754b/DX9.jpg DX11: http://s20.postimage.org/z5fb9j9uz/DX10.jpg

2. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by lpcstr · Dec 2012 · Home› Unreal Engine

   The acne isn't just on the cube. It's all over the model of the head as well, and it's not a limitation, it a complete and utter disability. In DX9 mode, acne only shows up at extreme angles and can be avoided. In DX11 mode, they are everywhere and no amount of moving the lights around will hide it. It is so bad that you…

3. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by Joopson · Dec 2012 · Home› Unreal Engine

   DX11 works fine for me, without any of these issues. So maybe it's something about your Graphics Card?

4. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by James Ordner · Dec 2012 · Home› Unreal Engine

   I'm not saying that this specifically is a DX11 issue in UDK, I'm just saying UDK does have quite a few DX11 issues.

5. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by Jacky · Dec 2012 · Home› Unreal Engine

   I don't think thats a DX11 issue. I've had that kind of problem with DX9 as well. Search through UDK forums, it's been asked a couple of times but i don't remember how to get over it since i don't use dynamic lights so often.

6. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by lpcstr · Dec 2012 · Home› Unreal Engine

   So you are basically saying that UDK is a buggy piece of shit and Epic can't even put together a mediocre renderer that works in basic scenarios. Yes I'm sure. The images don't lie.

7. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by Ace-Angel · Dec 2012 · Home› Unreal Engine

   DX11 (IIRC) will force RT shadows for certain assets, there is nothing you can do about it. And frankly, I don't see this is a failure from Epic's side, since high quality shadows, especially with correct distance bias are expensive, VERY expensive, especially for engines lacking a Proxy-Mesh-Shadow casting option for…

8. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by Ace-Angel · Dec 2012 · Home› Unreal Engine

   Are you sure? That's exactly how my DX9 looks with shadows at harsh angles.

9. Re: Shadow acne, only in DirectX 11 mode

   

   Reply by James Ordner · Dec 2012 · Home› Unreal Engine

   UDK has quite a few DX11 issues. It's a very buggy system, and has been since DX11 was implemented. Unless you specifically need it, I would stick to DX9. You can still make your game look really awesome, you just won't have fancy features like tessellation and texture displacement.

10. Re: Shadow acne, only in DirectX 11 mode

    

    Reply by leleuxart · Dec 2012 · Home› Unreal Engine

    Yeah, this. I'm not sure what caused lpcstr to have such a negative feeling to DX11, but I haven't had any problems. Even on multiple systems and UDK versions.