Trails in the Sky 2nd Chapter (4225980)

Compatibility Report

• Name of the game with compatibility issues: Trails in the Sky 2nd Chapter
• Steam AppID of the game: 4225980

System Information

• GPU: NVIDIA GeForce RTX 5060
• Video driver version: NVIDIA 610.57.04 (open kernel module)
• Kernel version: 7.1.8-200.fc44.x86_64
• Link to full system information report as Gist: not provided
• Proton version: Proton 11.0-2c (affected); Proton 10.0-4b (not affected)

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

Symptoms

Semi-transparent black shadow blocks flicker on indoor floors/tables. They look like shadows cast by local lights (see the shadow blocks behind the lamp at top-left of the picture). The shadows changes only when camera moves.

The issue is reproducible by walking back and forth across the same spot.

Changing FSR/DLSS, disabling SSAO/DoF, and any other graphic settings DOES NOT HELP. The issue occurs with Proton 11.0-2c and Proton Experimental.

Switching the game to Proton 10.0-4b fixes the flickering at the same location.

Game build: 25340742

Reproduction

1. Run the game with Proton 11.0-2c.
2. Load a save in (literally any) indoor room with local lights.
3. Walk back and forth. The shadow blocks appear and disappear.
4. Exit the game and select Proton 10.0-4b without changing anything else. The shadows no longer flicker.

Notes

This protondb report reports similar issue. Maybe something went wrong with DXVK 2.7.1?