Rhino Import Troubleshooting


Product(s):MAXSURF Modeler
Version(s):23.06.00.137
Area:Import

Problem

Model is not properly imported from Rhino. 

Solution

Check coordinate system

Go to Window | Control Points and ensure the Offset values are positive (starboard).

More information: Import/Export model - Coordinate system

Units

Check the size and units of the model in Rhino before attempting to read the file in Modeler. It is advised to import full-scale models. 

Appropriate level of detail

Delete all parts of the Rhino model that do not contribute to the watertight envelope of the hull or those that are required to model complex tank shapes. Details like portholes, deck stanchions, sails, standing rigging, propellers, etc should generally be removed from the model. Modeler is limited to a maximum of 1200 NURBS surfaces, if the Rhino model exceeds this number they will be ignored by Modeler.

Explode Manifold, Poly and other Compound surfaces

Modeler can only read standard NURBS surfaces from the Rhino file, so if you have any compound surfaces in the Rhino file, explode them before attempting to read into Modeler. A manifold surface in Rhino is basically a group of surfaces. Modeler cannot import manifold surfaces and an error message will be displayed. Manifold surfaces need to be exploded into the component surfaces in Rhino prior to importing the model into Modeler

Trimming Guidelines

There are some fundamental differences with the way the trimming works in Modeler and in other 3d modelling programs like Rhino – Modeler attempts to replicate the Rhino or iges trimming but it does not always work because the different programs follow different rules. When you bring a trimmed rhino model into Modeler a dialog will ask you if you want to replicate the trimmed regions:

If you click ‘Yes’ Modeler will attempt to replicate the trimming regions as per the Rhino model. If you click ‘No’ the model will come into Modeler untrimmed and the user can then re-trim the model in Modeler if required.

If at all possible leave the cutting objects in the Rhino file. This will make it easier to recreate the trimming in Modeler.

See Also