Dxvk: The Witcher 3 Texture Flickering

[linuxwrper]

Certain terrain flickers. Ground/earth on side of grass planes and mountains/rocks. Plants and other greenery seem to be unaffected.

Also uploaded video clips and more pictures showing the issue to Firefox send (limited to 24hours, will renew link when necessary):
https://send.firefox.com/download/603dd3311b/#ghj0LzAff2ffInpu6hmBpQ
The clips show the issue best

Software information

Witcher 3 Wild Hunt
Vsync: On
Resolution: 1920 x 1080
FPS limit: 60
Everything else set to Ultra with exception of:
Detail Level: High
Shadow Quality: medium

Ran the game through Proton 3.16-6 Beta. Had the issue with non beta.
GPU: RX 580 Nitro+ 4GB
INTEL-MESA: warning: Haswell Vulkan support is incomplete deviceName = Intel(R) Haswell Desktop deviceName = AMD RADV POLARIS10 (LLVM 8.0.0)

server glx vendor string: SGI server glx version string: 1.4 client glx vendor string: Mesa Project and SGI client glx version string: 1.4 OpenGL vendor string: X.Org OpenGL renderer string: Radeon RX 580 Series (POLARIS10, DRM 3.27.0, 4.19.11-041911-generic, LLVM 8.0.0) OpenGL core profile version string: 4.5 (Core Profile) Mesa 19.0.0-devel - padoka PPA OpenGL core profile shading language version string: 4.50 OpenGL version string: 4.5 (Compatibility Profile) Mesa 19.0.0-devel - padoka PPA OpenGL shading language version string: 4.50 OpenGL ES profile version string: OpenGL ES 3.2 Mesa 19.0.0-devel - padoka PPA OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

Attempts at finding the cause of the issue:

• Installed kernel 4.19, was at 4.15 prior to installation. No effect
• Toggled graphic settings on and off (vsync, window mode, etc) to see if flicker stopped. Only changing Texture quality had a impact but the issue of things not rendering was still prevalent.

[Oschowa]

This looks very much like this llvm regression which has recently been fixed. Try again with llvm7 or wait until your ppa updates llvm to the revision which contains the fix.

[K0bin]

You opened the same issue twice. #830

[doitsujin]

This is a known LLVM regression as @Oschowa said, please update to the latest revision.

[linuxwrper]

This is a known LLVM regression as @Oschowa said, please update to the latest revision.

Ty. I will wait for update.