Bus and car

What to look at

The bus top (3.2 m) is well above the horizon; the car top just under it. Three different heights, one horizon.

The bus's long side converges strongly because it runs 12 m away from you.

Use the figure to check: the bus is nearly two people tall.

What this scene is for

A 12 m bus box, a car box and a figure in one scene, so the three heights people constantly get wrong — 3.2 m, 1.5 m and 1.75 m — can be checked against each other and against one horizon.

The mistake it settles

Drawing a bus as a big car. The bus top is well above the 1.6 m horizon and the car top just below it, which means you see the bus's side and the car's roof in the same picture. If both are drawn from the same viewpoint with the same visible top, one of them is wrong.

The camera

Measured off this render

Taken from the same camera model the tool draws with, on the 1340 × 754 PNG above.

Draw it from these numbers

1. Rule the horizon across the sheet at 58% of the picture height — 437 px down on this 754 px render. Every other line in the scene is measured from it.
2. Two vanishing points on that line: 23 px beyond the left edge, and 1,780 px beyond the right edge — far enough out that you should match the grid angles instead of chasing it.
3. Set the scale from the 1.75 m figure at 5.5 m: 414 px tall, with 91% of it below the horizon. That share is the camera height divided by the object's height (1.6 ÷ 1.75 m), and it is the same for every object of that height anywhere in the picture.

Open the reference in the tool to move the camera, change the lens, or add your own objects at real sizes; the share link keeps your version. Draw over the PNG at 30–50% opacity in any app with layers.