Curly and coily hair is one of the hardest things to sell in CG. The moment every strand shares the same scale, the whole groom starts reading as artificial, and that gets even more obvious on dense, complex styles like dreadlocks.
Ornatrix Cinema 4D v4 adds a direct answer to that problem: Frizz Scale Randomness. Here is how it works.
Open your scene with the hairstyle. Add the Frizz modifier from the Ornatrix menu. Set Amount and Scale, and the Scale Randomness slider appears in the interface. Push that slider to the right and every strand gets its own random scale, which adds the kind of irregularity real hair actually has.
It is a small parameter, but it changes how believable the groom feels, especially on styles where regularity is the first thing that gives away a CG hairstyle.