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Power SubD-Nurbs

Plugin for MODO 901, 801, 701 & 601

Power SubD-NURBS lets you export Subdivision Surface meshes from MODO into NURBS-based CAD formats that load into a wide range of CAD systems. This tool facilitates use of MODO as a concept modeler at the initial stage of the design process -- where MODO’s ability to quickly create organic shapes is especially useful. With this tool, you can freeform model a variety of design alternatives in MODO and then transfer them to your CAD system for further refinement and engineering.


Power SubD-NURBS overview

Power SubD-NURBS, developed by IntegrityWare, lets you export Subdivision Surface meshes from MODO into NURBS-based CAD formats that load into a wide range of CAD systems.

This tool facilitates use of MODO as a concept modeler at the initial stage of the design process -- where MODO’s ability to quickly create design iterations is especially useful. With this tool, you can bridge the gap between Subdivision surface modeling and NURBS modeling, unifying free-form conceptual design with NURBS-based operations like filleting and blending.


Power SubD-NURBS settings

Power SubD-NURBS provides the ability to convert your Sub-D meshes into high quality NURBS surfaces with the following controls and workflow:

Export file formats

  • IGES – .igs extension (Initial Graphics Exchange Specification)
  • Rhino – .3dm extension (McNeel’s openNURBS format)*
  • SAT – .sat extension (ACIS SAT file format)
  • STEP – .stp extension (ISO 10303, AP 203 format)

*Please note that RHINO export is for Windows only.

Polygonal vs. SubD Faces — The plug-in can perform two types of exports: either “one-to-one” where each face of the mesh becomes a single planar face in the CAD format, or “smooth” where subdivided faces of the mesh will be combined to define curved NURBS surfaces. 

Subdivision quality – Controls the density of the resulting NURBS surfaces. “Medium” setting uses the level that the plug-in determines to be optimal, but if the resulting quality is too low then using “Fine” or “Very Fine” can improve the results.

Edge detection angle – Determines where weighted edges or fairly sharp angles should be transferred to the resulting CAD data.

Enable crease edges – Checking this setting will prevent the plug-in from trying to smoothly blend the continuity of surfaces that meet at sharp angles. 

Triangulate invalid quads – This setting can improve the results when the mesh contains quads with very extreme angles between edges.

MODO materials – The plug-in uses MODO materials as part of the criteria for determining the final surface breakdown in order to guarantee that there will be an edge along the boundary between different materials. 

“Power SubD-NURBS for MODO brings my workflow to the next level. I can now combine the freedom of surface subdivision modeling with the superior accuracy of NURBS technology – the best of the two worlds!”
Pascal Beeckmans
“Organic NURBS surfacing is no longer strictly the domain of T-Splines! Modeling in MODO and exporting to your CAD package of choice is a powerful workflow. MODO+NURBS; two great tastes that taste great together!”
Branden Coker

Power SubD-NURBS for MODO 601 review by Josh Mings

If you know MODO, you know it’s a powerful full-featured polygonal modeling to animation program. The surfacing and sculpting capabilities are phenomenal. Additionally, MODO is able to create Subdivision (SubD) surfaces to refine the polygon mesh and, may I say, do so quite beautifully. The problem? CAD software is NURBS-based and doesn’t like those crazy meshes too much. Hence, Power SubD-NURBS, a new plug-in for MODO that converts SubD surfaces to a clean NURBS-based format.

This allows MODO to be used as a flexible conceptual modeling tool at the initial stage of the design process, where MODO’s ability to quickly create organic shapes is especially useful. With this plug-in you can freeform model a variety of design alternatives in MODO and then transfer them to your CAD system for further refinement and engineering.

Read the full review