My sims's sculpting is 10/10 and when I decided to make a sim ice sculpture for the first time the sculpture had some black/grey looking areas like flaws around the body of the sculpture. A huge area on the stomach and lower back and other smaller flaws in chin and feet and that happens everytime. I watched a sim sculpting video on YouTube and it seems that the sim sculpture in that video didn't have any flaws. How can I make a flawless sim sculpture?