Compatibility Report

• Name of the game with compatibility issues: Call of Duty: Black Ops III - Mod Tools
• Steam AppID of the game: 455130

System Information

• GPU: NVIDIA GeForce RTX 4080
• Video driver version: NVIDIA 580.82.09
• Kernel version: 6.16.8-arch3-1
• Link to full system information report: Gist
• Proton version: Experimental

I confirm:

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

Proton Log: steam-455130.log

Symptoms:

Radiant launches, but the 3D viewport only displays black textures. No materials render correctly.

Menus and UI elements in Radiant work, and entities can be placed, but the tool is effectively unusable without texture visibility.

Reproduction

1. Install Call of Duty: Black Ops III – Mod Tools (AppID 455130) from Steam.
2. Launch with Proton Experimental (also tested with Proton GE).
3. From the Mod Tools Launcher, open Radiant with a new or existing map.
4. Observe that the 3D viewport only displays black/missing textures.