/ic/ - Artwork/Critique

>>6654374
the ones i've drawn are really shitty but here:
top row and left column are 1-point and 2-point perspective hitting four main viewing angles: 0 degrees, 45 degrees, 22.5 degrees, and 67.5 degrees. 22.5 and 67.5 are just halfway between 45 and 0 or 90. these are easy to draw because you just need the ratio between the left and right halves to be correct, either 1:1 or 3:1 or 1:3.
everything else is derived from applying these rotations to an angle you've already drawn, but if you look closely quite a few of them are symmetrical, so you probably only need to really memorize the shapes of a few.
at the bottom is how you could construct one of the rotations manually. we're just constructing a 1:3 ratio in perspective to get the new vanishing points.