Meshing rules of SubD

SubDs in Rhino may be meshed in three different methods for rendering, viewport display, surface analysis, and mesh conversion. The three meshing methods are static, adaptive, and absolute.

Where in Rhino these meshing methods are used?

Static meshing

How many mesh quads are created per SubD quad is based on the face count of the SubD.

Face count

Per SubD

1-2000 2001-8000 8001-32K >32K
Mesh quads
per SubD quad
16x16 8x8 4x4 2x2

Adaptive meshing

How many mesh quads are created per SubD quad is based on the face count of the SubD and the Adaptive subdivision level slider in meshing dialog boxes. The table below shows how many mesh quads will be created from each SubD quad. For example, when a SubD has 501-2000 faces, and the level slider is at 3, 8x8 mesh quads will be created from each SubD quad.

Level Face count per SubD
1‑500 501‑2000 2001‑8000 8001‑32K >32K
1 2x2 2x2 2x2 2x2 2x2
2 4x4 4x4 4x4 4x4
3 8x8 8x8 8x8
4 16x16 16x16
5 32x32

Absolute meshing

How many mesh quads are created per SubD quad is completely based on the Absolute subdivision level slider. No other factor is involved.

Level

Mesh quads

per SubD quad

1

2x2

2

4x4

3

8x8

4

16x16

5

32x32

Use of three meshing methods

This table shows where in Rhino the three meshing methods are used for SubD.

 

Static

meshing

Adaptive

meshing

Absolute

meshing

Display modes that shade objects
except Raytraced mode
   

Document Properties > Mesh
(For Raytraced viewport and final rendering)

   

Object Properties > Custom mesh

(For Raytraced viewport and final rendering)

   
Surface analysis commands > Adjust mesh  

 
Mesh command / export

Simple controls

   

Detailed controls

   

 

 

 

Rhinoceros 8 © 2010-2024 Robert McNeel & Associates. 07-Jun-2024