CAD tip # 12233:

Question

CAD
% platform category

How to compare two 3D mesh models and find differences/changes?

You may need to compare two general 3D models - find differences between two independently acquired models (e.g. 3D scan of an old and new state of a scene), or differences between two versions - the original and edited 3D model. And if these models were created in different CAD software applications, it is also necessary to compare them on the level as low as of the surface geometry, i.e. as a 3D mesh.

For this job, you can use the software Autodesk ReCap Photo (formerly "Memento" and "ReMake", now a part of ReCap Pro, also in Collections). This app can compare two mesh models, align them and highlight any added or removed geometry.

The comparison function can be found in the panel Analyze > Compare two models. In the panel "Difference analysis" then select both .RCM models and set the requested parameters (precision) for the comparison.

An example of comparing an edited scanned model of a handle:

The models can be acquired by converting from photos, from 3D scans, or loaded from the FBX, OBJ, PLY and STL format files.

See also our older blog Autodesk Memento - porovnání 3D modelù (in Czech).

ReCapMementoCollection

* CAD

10.5.2019 30633×

Comments Tell a friend

Prices - CAD eShop:

applies to: ReCap · Memento · Collection ·

See also:
Tip 14075:	Overview of CAD formats supported in Inventor 2025 (import/export/AnyCAD).
Tip 14022:	Comparing design versions in Autodesk Fusion.
Tip 13800:	Visually compare 3D geometry in CAD and BIM files.
Tip 13683:	Limitations of the LISP language (AutoLISP, VisualLISP) in AutoCAD LT - what to watch out for
Tip 13280:	How to publish models in USD/USDz format from Inventor?

Selected tip: Using multiprocessing in AutoCAD (how many cores can AutoCAD use?)

Back All CAD Tips

UnfoldRS - unfold 3D surfaces to 2D in AutoCAD. « | » How to set decimal precision (number of dec.places) for Inventor 3D Annotations?

Have we helped you? If you want to support the CAD Forum web service, consider buying one of our CAD applications, or our custom software development offerings, or donating via PayPal (see above). You may also add a link to your web - like this "fan" link:

CAD: OS: Categ:
Text:	FAQ glossary

Featuring:
Publish interactive 3D PDF models from AutoCAD, Inventor or Revit with Share3D More info

Please use these tips at your own risk.
Arkance Systems is not responsible for possible problems that may occur as a result of using any of these tips.

	CAD Forum - tips, tricks, utilities, help, how-tos and FAQ for AutoCAD, LT, Inventor, Revit, Map, Civil 3D, Fusion 360, Forma, 3ds Max and other Autodesk software (support by Arkance Systems) - see About	Arkance Systems CZ s.r.o. (CAD Studio) - Autodesk Platinum Partner & Training Center & Consulting Services Partner	CONTACT: webmaster.cz@arkance-systems.com tel. +420 910 970 111
	Copyright © 2024 \| Advertise with us \| Online privacy

CZ \| EN \| DE
Login or
registration
	Visitors: 7044