Stacked and rotated boxes

What to look at

The rotated boxes have their own vanishing points on the same horizon: rotation slides the points along it.

A box on a box shares the lower box's top plane; its base ellipse of contact is a rectangle in perspective.

Tall block vs slab: the same edges, different proportions, same rules.

What this scene is for

A cube, a cube rotated 30°, a slab and a tall block — four boxes with three different pairs of vanishing points on one horizon. Use it as the drill for two-point construction, and as proof that rotating an object does not need a new drawing, just new points on the same line.

The mistake it settles

Giving each rotated object its own horizon. Rotation slides the vanishing points along the horizon; it never moves the horizon itself. Two boxes on the same floor always share a horizon, whatever angle they sit at, and drawing a second horizon for a turned object is the most common way a still life goes 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 56% of the picture height — 422 px down on this 754 px render. Every other line in the scene is measured from it.
2. Two vanishing points on that line: 63 px from the left edge, and 2,124 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 m cube at 5.1 m, 260 px tall on the render; the horizon passes above it, so it is shorter than the 1.6 m camera.

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.