The Armorstands in the image are placed 0.05 blocks from each other(The minimum distance to make them render apart from each other). This limitation would be fine, but as you can see in the image they are NOT rendered at the same distance.

In the second Picture you can see a 40x40 Matrix of ArmorStands with wool on their heads (Checkerboard Pattern). As you can see this displacement has a pattern.

To reproduce: (2 Commandblocks)

1. Commandblock (Repeat): summon ArmorStand ~ ~ ~3

2. Commandblock (Chain): tp @e[type=ArmorStand] ~ ~ ~0.05