The ReduceMesh command decreases the polygon mesh face count while minimizing geometric and texture distortion.


The mesh is first triangulated, its polygon count is reduced, and the resulting triangular mesh is quadrangulated again.
Nonmanifold meshes (meshes whose edges are shared by more than two faces) may result. This may be undesirable in some cases.


1. Select mesh objects.
2. Set the new polygon count.

Reduce Mesh Options

Starting polygon count

The number of triangles after all quadrangles are split.

Note: Each quadrangle converts into two triangles, but some may not convert back to quadrangles, so it is possible that reducing the mesh may result in more faces than the starting number.

Reduce to ___ polygons

Specifies the desired number of polygons.

Reduce by ___ percent

Specifies reduction by a percentage of the starting polygon count.

Planar only

Restricts reduction to planar polygons.

Fast <—|—> Accurate


Trades speed for accuracy during conversion. Reduction is performed more randomly, involving fewer calculations, and is therefore faster.


Produces the fewest visible artifacts. This involves more calculations and is therefore slower.


Click Preview to display a preview of the output.

If you change the settings, click Preview again to refresh the display.

See also

Edit mesh objects

Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015