← artdaily

Vanishing Act

hunt vanishing points and aim receding edges

round
–
score
–
best
–

Loading…

Where receding edges actually meet

Six puzzles make a round, alternating two jobs. A hunt puzzle gives two edges running away from you and no point: press the dot at the near end of either edge and stroke it onward to where you think they meet. An aim puzzle gives the point instead, and you pull a receding edge into it blind — the ink appears only when you let go, so it tests aim rather than tracing. When you let go, the drill lays the real construction over your attempt in accent and prints the raw miss beside it — 14px left of the point, or 2.1° off and aimed 9px high.

Both jobs rest on one fact: parallel edges running away from the viewer converge on a single spot, and that spot sits on the horizon, at eye level. Extending an edge until it arrives there is what construction lines do on paper; aiming a new edge at a point you already have is the half that decides whether a second box agrees with the first. A stroke that runs out of trackpad resumes where you lifted.

What the geometry pays

Nothing here is timed. A hunt stroke earns half its points on the angle between it and the true tip-to-point ray, against an 18° base tolerance, and half on how near the line passes to the point — measured perpendicular to your line rather than along the horizon, since a shallow ray turns a 1° wobble into three or four times as much sideways error (11% of canvas width, with a 42px floor). An aim stroke is scored on its best-fit angle off the true edge, folded into 0–90°. Both are scaled by straightness, the RMS wobble off the stroke's own best-fit line, so a line corrected halfway across loses to one committed pull. The round is the mean of six, recapped with a hunt/aim split. No model is involved in any of it: every term is an angle or a distance measured against the construction the puzzle was built from, so the same stroke always earns the same mark.

More form & perspective drills: Cube From Plane · Box Check · Vanishing Point Hunt · the whole catalogue