Hope Pyyer doesn't get upset, but here is my take on his two F1 mods and the stock track for Imola. Let's be clear, I take no credit for these. These are all Pyyer's work. I just made some changes to make a few things more to my liking.
-- Darkened up the tree textures. There is actually 3 variations on tree brightness. Default is set to medium. You can edit the ext_config and activate the lighter or darker version (ACTIVE = 1). Make sure to deactivate the mid option (ACTIVE = 0).
-- Edited the seasonal adjustments so that fall doesn't come as early and winter is not as long.
-- Edited the lights so that the track state lights show on the indicators (pit lights, lights above S/F line, etc.) Pyyer's had the glow of the lights but for some reason the actual light was not coming on. Could just be my system. Maybe I use a buggy CSP version.
-- Removed the 3D trees because I hate them. Can be turned back on by deactivating (ACTIVE = 0) the option in the ext_config.
-- Small grassfx change to make the grass grow over time. Stupid change I know, but I still included it.
-- Groove skin to get rid of purple tinted groove line and make it dark grey\black.
-- All of his original configs are included in a separate folder to easily revert back to defaults if you prefer. No need to download the mod again.
Imola Update
