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U225X / ENGINEERING UNWARRANTED

Datum Shroom / 3D Scan Alignment Marker

Public record / MDL-DATUM-001 / Revision IMPORT-01

PUBLIC RECORD
U225X

This record preserves the shared design conversation around a small scan marker: a simple mushroom silhouette carrying deliberately non-symmetric geometry so a scanner can distinguish orientation and align repeat captures. The attached material includes concept plates, Datum Shroom revisions, a slicer preview, spray references, and field-marker examples. The geometry is promising, but scan accuracy and print settings remain experimental until a controlled scan comparison is recorded.

STATUSRecovered / ExperimentalCLASSIFICATIONMDLMATERIALPLA / SCAN TARGET / MAGNET OPTIONDATE2026.09.05

TECHNICAL NOTES

An asymmetric mushroom-shaped registration marker designed to give phone and photogrammetry scans a repeatable orientation signal through irregular gear-like teeth, varied bumps, a bite notch, and a possible magnetic base.

SPECIFICATION

PurposeRepeatable scan registration and orientation
GeometryAsymmetric cap / irregular gear base / bumps / bite notch
ScaleApprox. 34 mm wide x 45 mm tall
Print0.20 mm layers / matte single-color option
MagnetOptional 10x3 mm pocket or flat base
StatusExperimental / scan validation pending
3MF historyRev 1 original + Rev 2 corrected project

FIELD IMAGES 13 ATTACHED

Datum Shroom / 3D Scan Alignment Marker - datum-shroom-final-product.png
IMAGE / FINAL MULTI-COLOR PRINT / FIELD RESULT
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-final-product-side.png
IMAGE / FINAL MULTI-COLOR PRINT / SIDE VIEW
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-slicer-preview.png
IMAGE / MULTI-FILAMENT SLICER PREVIEW / ATTACHED
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-concept-sheet.png
IMAGE / SCAN SHROOM CONCEPT PLATE / ATTACHED
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-reference-marker.jpg
IMAGE / REFERENCE MARKER / ATTACHEDReference image supplied by Robert Hutchins. Robert confirms this reference set uses his own photographs or images he created with ChatGPT. The separately credited research figure retains its own license.
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-photogrammetry-field.jpg
IMAGE / FIELD TARGET LAYOUT / ATTACHEDFigure 10 from New Target for Accurate Terrestrial Laser Scanning and Unmanned Aerial Vehicle Point Cloud Registration — © 2019 Tilen Urbančič, Žiga Roškar, Mojca Kosmatin Fras and Dejan Grigillo; CC BY 4.0. License ↗Shown as a separate image and scaled to fit the record and report. No content edits made by U225X.
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-marker-set.jpg
IMAGE / MARKER SET / ATTACHEDReference image supplied by Robert Hutchins. Robert confirms this reference set uses his own photographs or images he created with ChatGPT. The separately credited research figure retains its own license.
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-aesub-blue.jpg
IMAGE / SCANNING SPRAY REFERENCE / ATTACHEDReference image supplied by Robert Hutchins. Robert confirms this reference set uses his own photographs or images he created with ChatGPT. The separately credited research figure retains its own license.
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-scan-spray-before-after.jpg
IMAGE / SURFACE PREP BEFORE + AFTER / ATTACHEDReference image supplied by Robert Hutchins. Robert confirms this reference set uses his own photographs or images he created with ChatGPT. The separately credited research figure retains its own license.
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-aesub-orange.jpg
IMAGE / SCANNING SPRAY REFERENCE / ATTACHEDReference image supplied by Robert Hutchins. Robert confirms this reference set uses his own photographs or images he created with ChatGPT. The separately credited research figure retains its own license.
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-overview.png
IMAGE / DATUM SHROOM OVERVIEW / ATTACHED
Datum Shroom / 3D Scan Alignment Marker - datum-shroom-v2-overview.png
IMAGE / DATUM SHROOM V2 OVERVIEW / ATTACHED
Datum Shroom / 3D Scan Alignment Marker - scan-shroom-overview.png
IMAGE / SCAN SHROOM OVERVIEW / ATTACHED

DEVELOPMENT HISTORY

2026.09.05IMPORT-01Imported from the supplied shared chat with eleven unique attached images; one exact duplicate image was not republished.
2026.09.05CONCEPTCompared Scan Shroom and Datum Shroom geometry plates as alternate marker revisions.
2026.09.05FILESAdded the supplied 3MF project and STL mesh as direct public downloads for print and mesh testing.
2026.09.05FINALAdded the finished multi-color print photographs as the current physical result.
2026.09.05REV-02Added the corrected 3MF revision with repaired magnet pockets and larger magnet clearance; Revision 1 remains available for comparison.
2026.10.10PROJECT UPDATEConnected the newer project records: HOW-PIKA-001. Existing test limitations remain in place.