Sculpting is a form of art where the outer surface of the object, makes the sculpture,
it is a tri-dimensional expression.
The sculptor can even play with light, and shadow.
Optical glass brings the sculptor in a position where he can create in 4 dimensions.
A perfectly polished outer surface becomes a mirror inside the glass, where light is
reflected and refracted.
This makes the object react to the position of the viewer.
From a different position the object will look different.
It is therefore, impossible to get a real impression from one picture.
I hope this short video shows you, what I mean.