SHUKUSHAKU / ArUco DICT_4X4_50, unique IDs 0-3
Each tile is 60 x 60 mm outside, with a 45 x 45 mm black marker.
Print matte white base 0.6 mm thick and matte black cells 0.2 mm thick.
Import white-base.stl and one aruco-N-black.stl as parts of ONE object,
preserving coordinates. Do not arrange or drop parts separately.
The SCAD files provide combined models; a single extruder can change
colour at Z=0.6 mm using 0.2 mm layers. Print all at 100%.
Label the backs with their unique IDs. Do not use duplicate IDs.
Measure each black square after printing; enter the measurement in Shukushaku.

The TOP of each black marker must be level with the drawing. Recess tiles
or raise the drawing by 0.8 mm. Paper tiles are easier to keep coplanar.
Keep the entire white border clear. Use no glow, translucent or glossy
filaments. Loose tile spacing and orientation may vary; tiles must stay
flat during a capture. Place outside the document to crop them away.
Use the QR marker separately to open the website.

Paper option: aruco-tiles.pdf, Actual size / 100%, no Fit to page.
Camera calibration: charuco-calibration.pdf, printed flat at 100%.
Calibration corrects lens distortion, not curled paper or tile height.
Validate the completed workflow against a ruler in both directions.
