/ic/ - Artwork/Critique

>>2140918
This sounds like mechanical perspective which comes up in How to Draw by Scott Robertson.

you'd draw the ellipse in a plain rectangle and mark the major and minor axes (the parts where the ellipse touches the rectangle). You'd then redraw the rectangle in the perspective you want it in with the same points marked on rectangle. you then use those points to draw the ellipse.

this is about the best I can explain it.