Found 21 Autumn CC0 textures in library

Forest Floor

Forest Leaves 02

Forest Leaves 03

Forest Leaves 04

Ground 019

Ground 028

Leaf Set 006

Leaf Set 007

Leaf Set 011

Leaf Set 012

Leaf Set 015

Leaf Set 021

Leaves Forest Ground

Park Dirt

Scattered Leaves 001

Scattered Leaves 002

Scattered Leaves 003

Scattered Leaves 004

Scattered Leaves 005

Scattered Leaves 006

Scattered Leaves 007