Border between emptiness and fullness

What is emptiness and what is fullness?
Emptiness is an absence of all matter while fullness is an element, made of a material that has no vacuum.
Emptiness and fullness are opposed. In the void there is no matter, yet it is filled with a full. An ambiguity exists between these two terms. A space is apprehended by matter, by rhythm as well as by breathing. 
How with opacity and transparency can we give an optical illusion?

Urban Installation
Personal project