Here is my entry. The stump is an original photogrammetry asset of mine processed in Meshroom and then cleaned up (re-meshed and texture paint editing) in Blender. The moss and the grass are original textures, modeled, and used as particles to populate the stump. (The clover texture was a CC0 asset.) (The HDRI background is also a CC0 asset from hdrihaven.com.)

Minimal editing was done in Photoshop (sharpen, slight color correction, resize, and addition of Blender badge.)

Rendered in Blender using Cycles.