Sketchup Subdivide

Posted : admin On 1/26/2022

#SketchUp #Plugin #Face Split Plugin Name: FaceSplit Authors: Anar, Dan Rathbun, Pilou, Renderiza & TIG Download: Subdivide to Smooth the Mesh. Select a group or component containing only faces. Toggle Subdivision on or off. Adjust the smoothness by increasing or decreasing the number of smoothing iterations. Toggle subdivision off to return to the control-mesh whenever you need to.


Subdividing a mesh will split each polygon into smaller polygons and smooth the mesh. A cube will eventually turn into a sphere after enough iterations.

The original mesh is called the control-mesh and the subdivided result is called the final-mesh.

SUbD allows you to toggle between the control-mesh and final-mesh at any time. You can have the SUbD instance selected or it can be opened for editing when toggling between the two states.

SUbD uses OpenSubdiv for its subdivision computations which is optimized for quads. N-gons might not yield a satisfactory result. The free QuadFace Tools extension provides a set of tools to aid in modelling with quads in SketchUp.

Global Toggles

Menu: Extensions » SUbD » All Meshes

Sketchup Subdivide

You can turn subdivision on or off for all meshes in the model via the All Meshes menu.

This will affect all instances in the model which have previously subdivided. All other geometry will be unaffected.


Sketchup divide tool

To subdivide a mesh it must be contained in a Group or Component. It must only contain edges and faces.

Sub-groups or sub-components will prevent a mesh from being subdivided.


If the mesh contain too small faces it might cause the subdivision to fail. SketchUp has a fixed lower bound of precision where points closer than 1/1000' is considered to equal. The only workaround for this limitation is to scale the mesh up.

Beware that if you subdivide a mesh which doesn't consist of only triangles or quads they will be automatically triangulated before subdividing. This can produce triangles which are very small and cause the subdivision to fail.


Subdivisions are done in iterations. The default iteration when you toggle on subdivision for a mesh is one. Each quad in the control-mesh will be divided into four smaller quads and each triangle will be split into three smaller quads.

A 'quad' in the final-mesh will consist of two triangles with a soft and smooth edge separating them. These quads are Quad Face Tools compatible.

Subdividing a mesh quickly increase the number of polygons. A simple cube with fix faces will result in 1536 smaller quads (3072 triangles). This can affect the performance of your model so it's recommended to work with low iterations and increase before final presentation or rendering.

SUbD allow for up to four iterations. Beyond this point there will be little visual difference as the final-mesh will have normalized close to the limit surface .

Sketchup Subdivide


If the model become sluggish to work with you might want to reduce the number of iterations for your subdivisions while you work. At one iteration you will see a rough approximation of the limit-surface and can be convenient to work with when modelling when toggling back and forth between the control-mesh and final-mesh.

For more detailed control-meshes one iteration might even be enough to give the desired smoothness.


Menu: Extensions » SUbD » Preferences

Relative Sharpness

There are two ways to specify sharpness to creases.

Relative sharpness let you set the sharpness as a value between 0.0 and 1.0. Sharpness of 1.0 will be 100% sharp at any subdivision level, 0.5 sharpness would be 50% sharpness at any subdivision level.

Absolute sharpness sets the crease based on subdivision levels. If you have subdivided 2 times and set creasing to 1.0, then it produce a 50% creasing. If you increase the subdivision to 3 times, the sharpness remains at 1.0 and you get 33.3% sharpness.

Fix Manifolds

As of version 2.0, SUbD can subdivide meshes with internal faces. However, this isn't always desired. By enabling this option SUbD will check is a mesh is a manifold with internal faces. If it is then it will offer to remove the internal faces when attempting to subdivide.

Replace Push/Pull Tool

This option allows SUbD to replace the native SketchUp Push/Pull tool with SUbD's custom tool. When this is checked, whenever the native tool is activated, SUbD will intercept and active SUbD's custom push tool instead.


SUbD is translated to a number of languages. Select your preferred language from this drop down.

High DPI

How To Divide In Sketchup

If you use SketchUp 2017 this option is not available as everything will adapt to your monitor resolution automatically. This setting is only relevant for users of older SketchUp versions.

Sketchup Subdivide

If you are using a high-DPI monitor like a Retina monitor you want to enable the High DPI preference option. This double the size of the viewport UI widgets like the Crease Tool displays.

Sketchup Divide Tool

You may have to restart SketchUp for this setting to take full effect.