this is more of an opinion type of thing but i think when its soft enough to bite into (but obviously with a little bite because nobody likes mooshy pasta) and when it's not too hard to put a fork through
Answer:
vanishing point- A vanishing point is a point on the image plane of a perspective drawing where the two-dimensional perspective projections (or drawings) of mutually parallel lines in three-dimensional space appear to converge.
orthogonal- elating to or involving lines that are perpendicular or that form right angles, as in This design incorporates many orthogonal elements. Another word for this is orthographic. When lines are perpendicular, they intersect or meet to form a right angle.
picture plane- in perspective, the imaginary plane corresponding to the surface of a picture, perpendicular to the viewer's line of sight.
(A) its true they were originally invented during this time.