Editions SPEED, Paris, 1978
If it is true that all things have both an internal and external existence, it is rare, nevertheless, to simultaneously perceive both the interior and exterior of an object.
The mind may conceivably be able to contemplate all of the ensembles and all of the sides of an object, but such global vision remains an exception in the physical world.
William Hogarth expressed it this way: » But in the common way of taking the view of any opaque object, that part of its surface, which fronts the eye, is apt to occupy the mind alone, and the opposite, nay even every other part of it whatever, is left unthought of at that time.
The opaque screens formed by the sides of an object or the walls of a building naturally bring us to wonder, in terms of transparency, about the simultaneous vision of all their parts.
Lattice panels have an ambiguous property in describing planes and volume without hiding the space beyond.