TT SUbD 2.1.7 for Sketchup 2021

Subdivide quads in SketchUp. Parametric subdivision.Optimized for quad-meshes. Perfect for organic modelling.

Why Work with Quads

• When you have a mesh based on quads it add a lot of benefits. The mesh becomes more regular and predictable. The grid structure that comes from quads provide meshes with directions of flow.
• Tools can follow an edge and select loops in a predictable order.
• Or they can select every opposite edge, making a ring selection.
• UV mapping is also easier - the grid makes the mesh easier to map seamless texture mapping.

Working with Quads in SketchUp

• When working with quad based meshes you quickly discover the need for quads where the vertices aren't coplanar.
• In SketchUp this can be a challenge because SketchUp's Auto-Fold feature will break a quad into two triangles once it's vertices isn't coplanar any more.
• To allow extensions to work with quads that are not coplanar they need to be able to determine which pair of triangles represent a quad. There is no official standard for this, but the de-facto standard is the QuadFace Tools type of quads.
• The definition of a QuadFace Tools quad is that two triangles share an edge which is soft and smooth - with Cast Shadows turned off.
• It is highly recommended that you also install QuadFace Tools to assist in creating quad based meshes for subdividing with SUbD. I is a core tool for creating ideal geometry that subdivide well.