This is a new version of the FALLPAQQ you all know and love but its for 1.17.1!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! and the tree leaves are less saturated and a few other minor changes HERE IS THE PACK DESCRIPTION:

This resource pack changes Oak, Birch, and Dark Oak leaves and It yellows the grass a bit so the game looks like its in the fall season it also adds dozens of new mob skin variants. Some spawning in certain biomes only and others really rare. Some examples are the cows it adds 9 new cow textures based on real life cows.(REQUIRES OPTIFINE)