That's what's on the Brick of Scrutiny tonight, painted on fake mud, because there's not enough real mud in my life (kids, dogs, work....)
IRL, you can only just discern the carrier film around that aqilla. But the light shows up something rotten in the photos.
Might mix up some more thicker mud for that gap.
More actual weathering is in order.
Can't make the BoS much safer than this.