Feel free to give it a try. I'll admit it's not my best effort because there was so much wrong with the track that I only fixed what I could through the config and optional track skins. The textures are the same, but the shader values have been altered. Maybe some day i'll take a stab at fixing the couple of buildings and hay bales that have horrible shadowing.
matsugadake_shader changes
Couple of notes:
-- You don't need to use either of the track skins. They just make the grass progressively darker than the adjustments I made with the config. Try the track without either track skin first and if the grass is still too bright, then try enabling one of the skins and see if you prefer it that way.
-- You don't need to use the included vao patch so feel free to delete it.
Before:
View attachment 1423514
After:
View attachment 1423515