mushroom man

This is my first completed artwork. I individually finish the mushroom man, and use the assetes from Quixel （the texture,model of stone, soil and tree) to complete the scene. The original concept is from the artwork of artstation. It was advised by the instructors of Moxingzhi. The texture of mushroom is my weak point. because the workload is huge and difficult to adjust in Zbrush. hope someone can tell me the way that can quickly and easily modify the mushroom texture.

Refernence
Tyler Vail(2021). TTRPG samples, Myconid Brute, Wolfhawk, Circlet of Nature, Shadow Dagger. Artsation.