{"id":1353,"date":"2021-11-18T19:48:00","date_gmt":"2021-11-18T10:48:00","guid":{"rendered":"https:\/\/zki-design.com\/?p=1353"},"modified":"2026-03-11T20:07:24","modified_gmt":"2026-03-11T11:07:24","slug":"mesh-to-surface-01","status":"publish","type":"post","link":"https:\/\/zki-design.com\/en\/blog\/blender\/mesh-to-surface-01\/","title":{"rendered":"Convert curved mesh to curved surface model"},"content":{"rendered":"

Sharing study model with surface model <\/h3>\n\n\n\n

Share the mesh model examined in Blender with the partner company as a surface model<\/span><\/strong>Opportunities have increased. In doing so, particular attention should be paid to howIs it possible to generate a surface model close to the original mesh shape?<\/span><\/strong>,I think.\u00a0<\/p>\n\n\n\n

This time, we will introduce how we have generated a surface model with high reproducibility so far.\u00a0<\/p>\n\n\n\n

Generate high-fidelity surface models <\/h3>\n\n\n\n

I read Suzanne exported with obj from Blender. (Subdivision Level 2) <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

I converted it to a surface model with "ToNURBS" as it is. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Let's compare in shaded view. It looks good at first glance, but...\u00a0<\/p>\n\n\n\n

\u32a7 Mesh model with obj loaded <\/p>\n\n\n\n

\u32a8The model converted by ToNURBS <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

However, in the rendered view, the edges of each surface appear raised. It seems that the faces of the mesh are simply converted to surfaces one by one. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Here, as another method, implemented from Rhino7SubD conversion<\/span><\/strong>I would like to take advantage of For the time being, I will try to convert with the default settings.\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Converted to SubD. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Slightly rounded shape<\/span><\/strong>I think that it is approximated by It's noticeable around the mouth and nose.\u00a0<\/p>\n\n\n\n

\u32a7 Mesh model with obj loaded <\/p>\n\n\n\n

\u32a5The model converted by ToNURBS <\/p>\n\n\n\n

\u32a8Model converted to SubD <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

100% adaptive size<\/span><\/strong>I tried.\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The original edge is beautifully reproduced.<\/span><\/strong>\u00a0<\/p>\n\n\n\n

\u32a7 SubD conversion model with adaptive size 50% <\/p>\n\n\n\n

\u32a8Adaptive size 100% SubD conversion model <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

I think that the reproducibility is high even when compared with the mesh model.<\/span><\/strong>\u00a0<\/p>\n\n\n\n

\u32a7 Mesh model with obj loaded <\/p>\n\n\n\n

\u32a8Adaptive size 100% SubD conversion model <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Finally, the adaptive size 100% SubD conversion model with "ToNURBS"Convert to surface model<\/span><\/strong>I'll try.\u00a0<\/p>\n\n\n\n

in render viewI don't understand the difference with the SubD model<\/span><\/strong>hey.\u00a0<\/p>\n\n\n\n

\u32a7 SubD conversion model with 100% adaptive size <\/p>\n\n\n\n

\u32a8Surface model converted from SubD model with ToNURBS\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

You can see that it has been converted in shaded view. <\/p>\n\n\n\n

\u32a7 SubD conversion model with 100% adaptive size <\/p>\n\n\n\n

\u32a8Surface model converted from SubD model with ToNURBS <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

A comparison of the original mesh model and the surface model converted from SubD.\u00a0very high reproducibility<\/span><\/strong>I think.<\/p>\n\n\n\n

\u32a7 Mesh model with obj loaded <\/p>\n\n\n\n

\u32a8Surface model converted from SubD model with ToNURBS\u00a0<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

In this procedure,We were able to convert the curved mesh created with Blender into a highly reproducible surface model.<\/span><\/strong>
\u00a0<\/p>\n\n\n\n

I will review the procedure again. <\/p>\n\n\n\n

  1. load mesh with obj <\/li>
  2. Convert mesh model to SubD (increasing adaptive size improves accuracy) <\/li>
  3. Convert SubD to NURBS (ToNURBS) <\/li><\/ol>\n\n\n\n


    For this verification, I referred to the following sites. It was very helpful. Thank you.\u00a0<\/p>\n\n\n\n

    \n
    [Intensive Course] Rhino7 New Feature: Let's use Quad Remesh!<\/a><\/blockquote>