STEP (.stp; .step) import/export

STEP (Standard for the Exchange of Product Data) is an ISO standard exchange format used for representing three-dimensional data in a format that can be recognized by multiple programs.


To open, import, insert, and attach a file as a worksession

  1. From the File menu, click Open, Insert, Import, or Worksession > Attach.

  2. In the dialog box, select a supported file type.
  3. Click Open and configure the settings.
    When you open a non-3dm file and save the model, its filename will be the default 3dm filename.

STP Import Options


Join surfaces

Joins surfaces with shared edges.

Do not join polysurfaces with more than ___ faces

Restricts the number of faces allowed in the resulting polysurface.

Skip invisible geometry

Do not import the objects in an "INVISIBILITY" entity.

Display nested block warning

If nested blocks occur, display a warning dialog box.

Always use these settings. Do not show this dialog again.

Saves the current settings and turns off the dialog display.

To turn the message back on

See also: ResetMessageBoxes command.


To save as or export a Rhino model

  1. On the File menu, click Export Selected or Save As.
  2. In the dialog box, the Files of type list displays the currently supported file types for export.
  3. In the Files of type box, select the supported file type.
  4. In the File name box, select or type a file name.
  5. Specify what is to be saved.
  6. Options

    Save small

    Though clearing the render meshes makes the file smaller, it will shade and render more slowly the next time you open the file.

    Save geometry only

    Saves geometry objects only. No layers, materials, properties, notes, or units settings are saved. This is similar to exporting the objects. A new file is made, but it does not become your active Rhino model.

    Save textures

    Embeds external textures used by materials, environments and decals into the model.

    Save plugin data Saves data attached to objects or the document by plug-in applications.
  7. If the export can be configured, click the Options button to specify export settings.
  8. Mesh file types export NURBS surfaces as meshes either with the specified meshing options, or the document render mesh settings.

STP Export Options


STEP schema

Your company standards determine which STEP schema you should use. If you have no standard, choose the default. The STEP schema number makes no difference to the data exported.

Export parameter space curves

Some (not most, and not Rhino) importing applications can make use of the 2-D trimming curves to get a more accurate and faster import. The size of the step file will be larger.

Let importing application set color for black objects

If a Rhino object has color black, no color is assigned to the object in the step file. This will cause the importing application to give the object its default color. This is desirable because black objects look like ink blots in some applications. This option is grayed out if the schema option is AP203ControConfigDesign since that schema does not include color entities.

Split closed surfaces

Splits closed surfaces, for example, the interior surfaces of drilled holes.

Always use these settings. Do not show this dialog again.

Saves the current settings and turns off the dialog display.

To turn the message back on

See also: ResetMessageBoxes command.

Related command


Toolbar Menu

Not on toolbars.

Not on menus.

The STEPTree command browses the structure of a STEP file.


See also

Wikipedia: ISO 10303




Not on toolbars.

Not on menus.

The StepUnitsAndTolerance command prompts to select a STEP file and reports its unit and tolerance.


See also

STEP import and export options




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