Perspective & depth

The six techniques

Here they are, from most powerful to most subtle. None of them needs special materials.

1 · Atmospheric perspective

The most powerful technique, and it’s free. In real life, the farther away something is, the more the air makes it look lighter, bluer and softer. Your eye reads that as distance without even thinking.

Use it in three layers:

• Foreground — maximum contrast, saturated colors, true blacks, sharp details.
• Middle ground — contrast reduced by a third, colors slightly grayed.
• Background — almost monochrome, very light, with a touch of blue added to every color. No black, no pure white.

Here’s how: mix a “distance wash” of white with a touch of blue, very thin, and brush it over everything in the back. One coat for the middle, two or three for the back. That’s it.

The same principle applies to the painted backdrop, where it matters even more.

2 · Graded sizes

Put smaller figures and buildings in the back than in the front. That’s exactly what the tiny “puce” size is for. Nativity builders in Germany and Austria even use a special “nativity ruler” that gives the right height of a door, table or step for each figure size.

Three things make it work without looking obvious:

1. Separate them physically

   Put a hedge, a wall or a dip in the ground between the two sizes. Two sizes side by side on the same path stand out right away.

2. Reduce the detail

   Keep things in the back free of fine detail. A face you can make out says “close,” no matter how small it is.

3. Never reverse it

   Smaller toward the back, never the other way around. See can you mix sizes?

For buildings, it’s called forced perspective: a house in the back built at 70% scale, with doors and windows shrunk to match. It’s a basic technique of the Neapolitan presepio.

3 · Converging lines

Anything long that points toward the back creates depth: a path, a wall, a stream, a row of trees.

• Angle them slightly inward toward a point near the stable. Two parallel walls say “box.” Two walls that come together say “distance.”
• Make them narrower toward the back. A path 2 inches (5 cm) wide in front and ¾ inch (2 cm) in back looks twice as long as it really is. See paths.
• Keep them off-center. A line down the middle looks stiff and symmetrical. Shifted about a third to one side, it adds movement.

4 · Overlap

The most underrated technique, and it costs nothing: anything partly hidden looks farther away.

Your eye figures out what’s in front and what’s behind from what blocks what. Every overlap adds another layer, and more depth.

• A foreground bush hiding the bottom of a house.
• A wall cutting across a path that reappears higher up.
• A figure seen only from the waist up behind a low wall.
• A tree right up front with its trunk cut off by the frame. Painters have used this trick for centuries, and it works just as well in 3D.

So a nativity where you can see everything looks flat. Be willing to hide things you spent time building. It feels wrong, but it makes all the difference.

5 · Light

Light creates layers just as well as paint does.

• Keep the front dark. It goes against instinct, but it works: a dark area in front frames the scene and pushes everything else back.
• The brightest spot is in the middle, at the stable.
• Light the back softly and a little cool, from the bottom of the backdrop. See lighting the backdrop.

Three levels of light make three clear layers, even in just 12 inches (30 cm) of depth.

6 · The format itself

Two choices you make when you build the box:

• Angled sides: open the sides 5 to 10 degrees toward the front. The scene widens toward the viewer, which deepens the effect. It’s a theater set trick, and nobody notices it.
• The slope of the ground: a rise of at least 1 inch for every 10 inches of depth. Flat ground has no depth, no matter what else you do.

And if you’re starting from scratch: choose depth over width. A 24 × 18-inch (60 × 45 cm) nativity is far more impressive than a 36 × 10-inch (90 × 25 cm) one, and takes up almost the same space.

Checking your result

Three quick tests, thirty seconds each:

1. The phone photo

   Take a photo from where people will stand, then look at it. A camera sees with one eye, just like people do from a distance, so depth problems jump out in the photo that you didn’t notice in person.

2. The one-eye test

   Look at the nativity with one eye closed. If it goes flat, it needs more overlapping and layering.

3. The squint test

   Squint until you only see light and dark shapes. You should see three clear zones: dark in front, light in the middle, very light in the back. If it all looks the same, go back to technique no. 1.