Rokket, there are a lot of aspects that need considering when you start down the "natural-looking" path. BB's approach has a lot of merit - since nature has laws and those laws should not be disobeyed in art without a good reason - his method of using natural/physical characteristics of real materials that can be expressed in a maths formula will yield much more natural, believeable objects that the more common approach of randomly plugging nodes together until a desired effect is produced under that particular light set, with all that implies.

But there is more to creating "natural-looking" than just believeable materials. Figures with presence, for instance. The typical catatonic look in so many of Poser characters in the galleries strains that believeablility even when the textures are perfect, the shadows spot-on, and the lighting to die for. KobaltKween gave sage advice when she suggested looking at photographs (of your target scene setting, for example) to use as reference. You are the viewer: the figures in your scene are living their life, enjoying their moments, and you are capturing that.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks