Raft and objects are white

I just installed Raft, and all the objects in the game appear white.

Specs:

• Acer Nitro 5
• Ubuntu 20.10
• graphics card: NVIDIA GeFORCE 1650
• driver: nvidia-driver-455
• PROTON_USE_WINED3D=1 %command% launch option

Is there an issue with the Proton runtime? Or what could be the problem? On protondb.com, there are lots of reviews saying that the game works flawlessly on Linux.

I've solved the problem...

...simply by removing the line PROTON_USE_WINED3D=1 %command% from the launch options.

I thought it was required, given that a Linux guide recommended this option for the game Among Us.