Sol Improvement (Sol upgrades and a new filter) for Assetto Corsa

What this mod does

Sol Improvement is a pack by Linus Britto for people still using Sol, Assetto Corsa’s free weather system. Since Sol no longer gets official updates (development has moved to Pure), the author adds improvements to extend its life and keep it compatible with modern Custom Shaders Patch versions.

What it improves

• A new moon texture and fixed phases; 3D clouds no longer overly bright under moonlight.
• Snowflakes in snowy weather (requires CSP 0.2.6 preview or later).
• Better god rays, an improved look for each weather type and finer CSP light control.
• Per-track adaptations and a new post-processing filter, “__Sol_Improvement”.

Compatibility

The author recommends CSP preview 0.2.6 to 0.2.9 or 0.3.0 onwards: Sol does not work with CSP 0.2.10 to 0.2.12 due to a code incompatibility. It is on version 1.5, from June 2026.

Requirements

• Assetto Corsa for PC
• Sol (free)
• Custom Shaders Patch 0.2.6–0.2.9 or 0.3.0 onwards
• Free OverTake.gg account to download

How to install it

1. Make sure your CSP is 0.2.6–0.2.9 or 0.3.0 onwards.
2. Download Sol Improvement from OverTake.gg (log in).
3. Install it over your Sol following the author’s instructions.
4. Select the __Sol_Improvement filter in the video settings.

Version history

1. 1.527 Jun 2026Current

   1.x improvements and track adaptations

Common problems