DJ Mustard has helped craft a hit for many a rapper.

But he won't craft a hit for an ugly rapper.

The producer posted his studio rules and the first pertains to people who don't look good.

DJ Mustard reveals his studio rules. pic.twitter.com/uKLQw21oC3

— SAY CHEESE! 👄🧀 (@SaycheeseDGTL) September 24, 2021

“Do not come in here if you’re f**king ugly," Mustard declared.  "If you did not hit the gym today ... Go the f*ck home.

Mustard has lost a ton of weight over the last couple of years and he's really feeling himself.