Ratchet & Clank - blocky corruption when looking at rift portals

[aufkrawall]

There is blocky corruption when looking at rift portals:

Happens with both RADV & amdvlk. Doesn't happen with native D3D12. Issue seems to disappear at some rendering/upsampling resolutions, but happens at most of them and also native 1440p TAA.

Software information

Ratchet & Clank, latest Steam version, maximum settings (RT off), TAA, 1440p

System information

• GPU: RX 7800 XT
• Driver: RADV mesa-git 183253.e36235e6d53 / amdvlk v-2023.Q4.3
• Wine version: Proton Experimental
• VKD3D-Proton version: 12f561cfe2156714ba17d3322230b87b65739714

Log files

steam-1895880.7z.zip

[Blisto91]

Can you highlight where on the image the issue is? I'm not sure i see it

[aufkrawall]

Sure:

Edit: Btw: Some textures/decals sometimes don't seem to load at high resolution (textures set to very high). But don't know if native D3D12 has the same issues (it stutters more though).

[Blisto91]

I haven't been able to reproduce this ingame at the same spot so far with either amdvlk or radv on my RX 6800. I have a 1080p monitor but tried faking 1440p with gamescope and also tried different upscaling techniques.

Will try again with rdna3 later.

[aufkrawall]

Thanks!

For whatever reason, I now can't reproduce with 100% TAA anymore either. But with any upscaler set to "quality", it triggers the issue:

[aufkrawall]

The issue seems to be caused by XeGTAO.

[Blisto91]

Okay sorry yes i can reproduce it now.

Attached a Vulkan renderdoc capture made with XeGTAO and XeSS on a RX 6800 with radv 23.3.3. Notice that the right side of the portal is darker which is the side with the glitching (it can move with the camera) https://drive.proton.me/urls/Y0XQZRP5G0#zSl7mhPv75bL

[HansKristian-Work]

I reproduce this on Windows too.

[HansKristian-Work]

The portal rendering seems to be contained within a bounding box.

There is an offset applies to the GlobalThreadID when writing the input to XeGTAO buffers.

But in the CS_XeGtaoFinalize pass, there is no offset in the shader, so the portal AO gets a sliced copy.

That causes either darkening or garbage in the right half.

[HansKristian-Work]

Closing as not our bug.

[aufkrawall]

Thanks for looking into this and your detailed explanation, really appreciated! I guess then it's hardly noticeable on Windows for some random/racy reasons.

Btw. did you notice that some textures aren't streamed in full resolution with VKD3D-Proton? It seems to match the result on Windows when you delete the DirectStorage DLLs there.

Windows with DS:

This is right after loading the level for the first time, no RT.

[aufkrawall]

@Blisto91 Can I convince you to check whether you can confirm the texture issue? :)