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Sol and Pure are weather and graphics mods for Assetto Corsa that plug into the Weather FX engine of Custom Shaders Patch (CSP). Pure is Sol’s successor. Both are installed on each player’s PC, not on the server. Your FREAKHOSTING server only decides which weather type runs, in the [WEATHER_x] sections of cfg/server_cfg.ini; Sol or Pure then decide how that weather looks on each player’s screen.

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How to install Pure on your PC

1

Install Content Manager and CSP

Pure needs both. See install Content Manager and CSP.
2

Download Pure

Download Pure from its author, Peter Boese, on Gumroad or Patreon.
3

Follow the included install guide

Pure ships with its own install guide. It copies its folders into your Assetto Corsa root folder.
4

Choose Pure in CSP

In Content Manager, open Settings > Custom Shaders Patch, go to the Weather FX settings and choose Pure as the weather style.
Sol works the same way through CSP’s Weather FX. Because Pure replaces Sol, most players now use Pure.

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How to set the weather on your server

Your server runs a list of weather types from server_cfg.ini:
1

Stop the server

Stop your server.
2

Edit the weather sections

In Files, open cfg/server_cfg.ini and change or add [WEATHER_x] sections. Number them from 0 without gaps.
3

Start and check

Start the server. The console shows the active weather, for example Weather update. Ambient: ... Graphics: 3_clear.
To build the weather in a visual editor, use Content Manager’s Server tab and upload the packed files. See Content Manager server presets.

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How to set the time of day

The time of day comes from SUN_ANGLE under [SERVER] (default 48). With CSP extra options, you can also set the track’s time zone and location in [WEATHER_FX], so lighting matches for all CSP players. See CSP features.

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Frequently asked questions

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Do I need to install Sol or Pure on the server?

No. They are graphics mods on players’ PCs. The server only sends the weather type.

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Why does the weather look different for my friends?

Each player sees the weather with their own graphics mods and settings. Players with Pure see Pure’s version of the same weather type.

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Can the server have rain?

Rain needs CSP on players’ PCs. CSP’s rain options for servers are marked as experimental and need preview builds, so test them first.

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Is Sol still updated?

Pure is the successor to Sol. Use Pure for new installs.

Assetto Corsa server guide

Every Assetto Corsa page in one place.

Content Manager and CSP

Install both first.

CSP features

Weather location and extra options.

server_cfg.ini explained

Every setting in the file.
Checked against the official Custom Shaders Patch page, the CSP server extra options documentation and Pure’s download page on 30 October 2026; server weather tested on our Game Panel. Mods and menus may change with new versions.

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Need Extra Help?

If you encounter any issues, our support team is ready to assist:

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Last Updated: October 2026