Subdivision, bridges, Y-branches, smooth surface patches, star point creation with G2 or higher continuity and much more.

XirusCAD® provides a new, intuitive CAD solution for organic and freeform modelling.

XirusCAD® simulates immediate responsiveness to a broad range of geometrical parameters that are key for complex 3D modeling such as:

  • direct control of tangents 
  • direct control of curvature 
  • direct access to the digital object through interpolating control points 
  • watertight junctions with immediate smoothness control 
  • subdivision and local refinement with controllable smoothness 
  • more localized control than NURBS and fewer parameters


XirusCAD® provides:

  • Local refinability wherever you want and whenever you need as with subdivision
  • Flexibility and ease-of-use of polygons but with fewer parameters and exact precision
  • Smoothness and organic shape design as with NURBS



Key Features

Feature/Property XirusCAD NURBS Subdivision Polygons
Direct Surface Control yes      
Decoupled control of tangents, curvature & surface points yes      
Watertight junctions yes   yes yes
Watertight junctions with direct smoothness control yes      
G0, G1 or G2 junctions between arbitary parameter lines yes      
Smooth junctions between different topologies yes      
Watertight junctions between different number of control points yes      
Subdivision and local refinement yes   yes yes
Select and manipulate entire or partial parameter lines yes     yes
Select and manipulate faces yes   yes yes
Maximally localized surface control (2x2 neighbourhood) yes     yes
Interpolating control points yes     yes
Organic smooth modelling yes yes yes  
Direct control of 'kinkness', 'sharpness' and smoothness of corners yes      
Exact conic sections, spherers, circles, torus, ellipsoids, arcs yes yes    
Exact transcendental curves (helix, cycloid, etc.) yes      
Surfaces of revolution, lofting, sweeping yes yes yes yes
Convert to polygones (quads & triangles) yes yes yes yes
Exact conversion to NURBS yes yes yes  
Arbiatary topology yes   yes yes


Technical Details


XirusCAD® is currently available for Windows 7, 8, 8.1 and 10.

Rhino 6.10 or Rhino 5 (64-bit): XirusCAD® is currently developed for Rhino 6 and Rhino 5. Note that for Rhino 6 compatibility, version 6.10 or higher needs to be installed (6.9 and previous are not compatible with XirusCAD). If you have Rhino 6 already installed and it says it’s up to date, you can manually install the update by downloading the installer from https://www.rhino3d.com/. 

The same XirusCAD license key works for both Rhino 6 and 5.



Note: Apple hardware is supported via Bootcamp or virtualization. 

  • 8 GB of RAM memory (16 GB recommended). 
  • 100 MB of disk space. 
  • OpenGL 4.1 capable video card is recommended. 
  • No more than 63 CPU Cores
  • Multiple-button mouse with scroll wheel is recommended. 


Operating systems 

  • Windows 10 (recommended). 
  • Windows 8, 8.1
  • Windows 7


Internet connection 

  • Internet connection is recommended for installation, activation and update, but it is not required. All those steps can be performed offline. 
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  • Last modified on Monday, 20 May 2019 16:52