AprilTag Scale Markers for Photogrammetry (36h11)

So, what's this then?
If you do any kind of photogrammetry, markers are great for ensuring that the software ‘recognizes’ what areas are shared between images. While scale markers make it far easier to lock said scans to the correct scale.
These are a couple of Apriltag 36h11 tags. 
24 scale tags in 12 sets of 2.
24 individual tags that are easier to print larger.

They're pretty small, at 7x17x0.14 cm, but this means that on any ‘normal’ sized printer, you should be able to print 3-4 pairs at the same time.
(Solo: 7x7x0.14cm)
You can of course scale these up or down, accordingly, the main thing that matters is the distance between the centers of the 2 paired markers, and you should be double-checking that with a ruler anyhow.

At this size they're best used as scale markers for smaller objects, but you can always scale them up a bit. 

So, what are these for?
I'm not going to go into much detail here: 
This is a resource for others who are familiar with Photogrammetry and want a couple quick-to-print AprilTags for use in future scanning projects. 

They're all paired up as odd-even pairs (001-002, etc.), and in the base model there's exactly 100mm between the centers. (Real world can of course vary from printer to printer/program to program.)
You should absolutely make sure to verify this once printed, however, and update the values in RealityCapture accordingly.

So, how do I print these?
Simple, the first 1mm of them is solid white, the remaining 0.4mm is solid black.
You can print these on any printer by just slapping in a layer change at layer 6. (Provided 0.2mm layers.)
With Multi-material printers you can define the colors with a fill tool, as each model is in fact 4 separate meshes.

You should use 2 opaque materials with high contrast. 
A ‘solid’ white and black is a good choice.

So, why AprilTags instead of 10-12bit circular ones?
I just think they're neat.

So, what tag IDs are included currently?
So far I've got Duo tags for 01-24. (12 pairs of 2.)
As well as 24 additional single tags. (25-48)
I'm thinking about making a couple standalone ones as well, since 12 pairs is plenty for most small projects.

Changelog:
1.0.1: Fixed missing extrusion on Duo 17/19/21/23.