An Artstyle replicating the artist "Scafen". Will take down if asked. Only one of these exists for illustrious, and even then, it was done with few steps, so hopefully, this is a better, more detailed alternative.
Follow the artist:
https://www.furaffinity.net/user/scafendragon
https://twitter.com/Scafenafterdark
https://bsky.app/profile/scarf.bsky.social
https://www.patreon.com/scafen