So I made a rough idea of this in one of my other base ideas, the base idea Pirate!
here it is: Pirate; without and with mottled rosette

Pirate V1 with MR and Fissure Patches Mutation and No MR with Uneven Patches Mutation
Pirate V1 with no MR and Bisected Piebald Mutation and No MR with Shreds Piebald Mutation
and I ended up liking this base a lot, so I drew up another idea of what it could look like!
Pirate V2; without and with mottled rosette

Pirate V2 with MR and Daedal Piebald Mutation and Cracked Piebald Mutation
Pirate V2 with MR and Uneven Patches Mutation and Harlequinn Piebald Mutation
I love black and white bases a lot, later I'll come in and add what they would look like on different poses and muties!!