3D projection mapping: map a box, corner or object at home

Mapping a flat wall is a good first exercise, but the moment projection mapping starts to look like magic is when it wraps around a volume. A box that pulses like a neon sculpture reads completely differently from a rectangle on a wall, even though the technique behind both is nearly the same.

This guide assumes you have projected something once before. If not, start with the basics and come back.

• A single cardboard box is the standard first 3D target: light, matte, rearrangeable, free. Paint it matte white if it has printing on it.
• Stacked boxes give you a skyline of faces to map and look far more impressive than the effort suggests.
• A room corner is an inside-out box: two walls and a ceiling meeting. Good when you have no object at hand.
• Avoid glossy, dark or transparent objects for now. They swallow or smear the projection.

Head-on, a box shows one face and the projection stays 2D. Move the projector 30 to 45 degrees off-axis and slightly above, so it sees two or three faces at once. Every face the projector can see is a face you can map.

Lock everything down before you start mapping. A projector nudged two millimetres after mapping means doing the corners again, so tripods and gaffer tape are your friends.

1. 1

   One quad per visible face. Add a Square, drag its four corners onto the four corners of one physical face. Repeat per face. Corners that meet on a shared edge should snap together so the seams stay closed.

2. 2

   Or use a cube shape. Lazy Lighting has a Cube shape that maps three faces in one gesture: drag the pose until it hugs the real box, and a full 3D box mapping takes under 20 minutes. For a room corner, use the Box shape instead: a back wall plus up to four sides.

3. 3

   Check the seams. Step back and look along each shared edge. A gap or overlap of a few pixels is visible from across the room; refine the corner pins until edges are continuous.

• Give each face its own treatment. Identical content on every face flattens the object. Vary hue, direction or timing per face and the volume pops.
• Use edges. Wireframe and outline visuals emphasise the geometry itself. They are the classic look of 3D mapping for a reason.
• Respect gravity. Content that flows downward on vertical faces and pools on horizontal ones reads as physical; content that ignores orientation reads as a sticker.
• Sync to sound. Movement on the beat makes the object feel alive. Audio input, LFOs or a fixed BPM all work; in Lazy Lighting they're part of Pro.

• Mapping before the projector is locked down. Always rig first, map second.
• Extreme projection angles. Past roughly 60 degrees off-axis, faces stretch and brightness drops noticeably.
• Chasing precision on a soft image. Focus the projector properly before adjusting corner pins.
• Skipping the save. Mapping is object- and position-specific; save the project so the setup can be rebuilt.