# What is the difference between surface and Polysurface Rhino?

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## Is mesh lighter than Polysurface?

Like surfaces, meshes can be open (there are naked, non joined edges), or closed (no naked edges). Meshes are generally “lighterthan surfaces. In Rhino, a surface not only is carrying the information to define the surface, it is also carrying a display mesh so the surface can be viewed in the viewport.

## How do I convert surface to Polysurface in rhino?

Help with converting surface to solid

1. Explode this curve.
2. Make 3 straight lines (the blue lines in that picture).
3. Select curves that would make up the edges of one of the missing surfaces and run PlanarSurface .
4. Repeat for the 3 missing surfaces. (

## Is Rhino a Nurb?

Rhino uses NURBS to represent curves and surfaces. NURBS curves and surfaces behave in similar ways and share a lot of terminology. Since curves are easiest to describe, we’ll cover them in detail. Rhino has surface tools that are analogous to the curve tools mentioned below.

## What is a Nurbs curve?

NURBS, Non-Uniform Rational B-Splines, are mathematical representations of 3D geometry that can accurately describe any shape from a simple 2D line, circle, arc, or curve to the most complex 3D organic free-form surface or solid.

## What is a mesh in Rhino?

A mesh is a collection of vertices and polygons that define the shape of an polyhedral object. Meshes in Rhino consist of triangles and quadrilaterals. Rhino creates triangles and quadrilaterals meshes for export into various file formats. If a mesh is generated from a solid, the mesh will be seamless/watertight.

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## How do I convert mesh to surface in Rhino?

Tutorial 1 – Convert a mesh to a surface

1. Video:
2. Step 2: Select Import… from the File menu. The import file dialog box is displayed. …
3. Step 3: Zoom to the extents of the drawing (View->Zoom->Extents). You will find the mesh from pipe. …
4. Step 4: The Rhino command prompt ‘Select a mesh to create a nurbs surface’ is displayed.

## How do you split a 3d object in rhino?

Splitting Models

1. Import your model into Rhino.
2. Draw a plane/surface where you intend to split your model. …
3. Type the command [MeshBooleanSplit]
4. Select you model, and hit enter.
5. Select the plane as your Cutting Object and hit [enter]
6. The resultant meshes should be split.
7. Meshes can now be exported as .

## How do you explode a mesh in Rhino?

Welding a mesh completely (Weld command, 180 degrees) then unwelding (Unweld command) at some reasonable angle such as 20-30 degrees may allow the mesh to explode into a more manageable number of meshes containing multiple polygon faces.