2-2 finetuning the displacement mapping effect
geometry approximation

displacement > subdivision step = 0

0 > 1 or 2 until you are satisfied

and fillay adjusting a few parameter render
2-3 finetuning the rendering effect
1. aliasing

2. optimization

3. final gathering (by default)

Let's take a physical practice ! sitting all day long in front of computer do harm for your health and your mind.
keep on exercising !!
