Its material realization-to use the correct expression-consists basically of a projection of reality, under favourable conditions, on to an irregularly tilting, and consequently distorting, plane of reference.
Honen gauzatzea berez, batipat errealitatearen projekzio batean datza, egurats zeihar eta berotu batean, erreferentzi planu irregularki ondulatu eta bihurritu baten gainean. Bistan denez, prozedura zilegia, holakorik baldin bada.