Update Steam/Proton compatibility#582
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loathingKernel merged 5 commits intoRareDevs:mainfrom Aug 18, 2025
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Aug 18, 2025
- Compatibility: export needed environment variables for per-game shader cache
- Compat: set STEAM_COMPAT_LIBRARY_PATHS and STEAM_COMPAT_INSTALL_PATH correctly
- ProtonSettings: add selection combobox for compat data path
- WineResolver: Set some env variables Proton expects unless they are already set.
- Paths: skip shader cleanup on nvidia
…r cache The controlling environment variable is now `STEAM_COMPAT_SHADER_PATH` which some custom protons also understand. For the moment, Rare will set up the effective environment in a way that each game gets its own shader cache dir even when a common compatibility data dir is used.
The combobox has three options, shared, isolated and custom. Shared sets it to the default prefix, i.e. the one shaders between games. Isolated uses a unique prefix for that game, incurring the usual space and setup time cost, but keeping thing clean. Custom uses a user-specified prefix.
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