Graphical issue on older hardware related to render composition

I've tried the game on my ~10 year old PC, and the game has graphical glitches. The menu looks the way it should, however the game in sandbox looks like the following:

1726901467420.png


The Video Settings are all set to low:

1726901563293.png

GPU: GTX 660
Renderer: D3D11
OS: Windows 10

Using Renderdoc to get some insight on the issue, the diffuse-, depth-, normal-, etc. render targets are correctly rendered, but they aren't correctly composited.
EID 6195 seems to be the last render command where the diffuse render target is rendered to.
I have attached the Renderdoc frame capture as well.

The game seems to do all the rendering steps and still produces over 60FPS using DX11 (Vulkan produces below 20 FPS), even though the output is wrong. It would be great if this issue could be fixed.
Updating drivers is not possible unfortunately, as this specific line of GPUs' support ended a few years ago.
 

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