iRacing has posted their 2023 Season 2 Patch 3 Release Notes

While it doesn’t include their new rain effects, it improves several aspects of their simulator. The upper limits for both CPU and GPU memory sliders in the graphics options have been increased to 32GB and 16GB to support modern systems, likely in preparation for the big rain update.

This patch also includes a variety of vehicle body panel adjustments that should generally weaken their strengths, and make the cars much more realistic.

You can find a laundry list of changes on their support forums.