Depth.
linear perspective :)
Artists didn't need to use perspective or create the illusion of depth.
A. Brunelleschi
Aerial perspective.
Linear Perspective
>> A mathematically correct form of linear perspective <<
linear perspective
Durer
Brunelleschi: Linear perspective.
Brunelleschi is credited with being the first to use geometric principles for creating linear perspective.
Yes it's linear... Most of his paintings are linear. Our art teacher was showing us the other day :)