# Datasmith Mesh Export Resolution

**URL:** <https://forums.unrealengine.com/t/datasmith-mesh-export-resolution/2014746>\
**Category:** Getting Started & Setup\
**Tags:** unreal-engine, question\
**Created:** [September 10, 2024, 2:26pm UTC](https://forums.unrealengine.com/t/datasmith-mesh-export-resolution/2014746 "2024-09-10T14:26:02Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![UE\_FlavienP](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ue_flavienp/32/1194546_2.png) [@UE\_FlavienP](https://forums.unrealengine.com/u/UE_FlavienP)\
**Post date:** [September 11, 2024, 12:05pm UTC](https://forums.unrealengine.com/t/datasmith-mesh-export-resolution/2014746/2 "2024-09-11T12:05:18Z")

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Hello,

If you have an FBX file I would import it directly in Unreal. Just normal import, Datasmith import will not work anyway unless file was generated from VRED or Deltagen.

If the model you import contains tessellated meshes (FBX is tessellated data), datasmith or normal UE import will just import as is. No simplification.

If you import a CAD file (.3dm) from rhino, then it will depends which options you setup in UE:  
If you select import as Nurbs, UE will retessellate available Nurbs geometry based on the settings you select in the import window.  
If you select to import Rhino mesh it will import available tessellated data as is, and discard tessellation settings form the import dialog.

 ![image](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/b/f/abf2d0990455651e772f1ec76c300d3591edc58d.png)

If you are exporting a uDatasmith file from Rhino, the exporter will get Rhino to tessellate Nurbs data to triangle as uDatasmith file do not carry parametric data.  
In that case the tessellation settings can be changed in Rhino

> **[Tessellation and Render Meshes - Using Datasmith with Rhino in Unreal Engine |...](https://dev.epicgames.com/documentation/en-us/unreal-engine/using-datasmith-with-rhino-in-unreal-engine#tessellationandrendermeshes)**
>
> This page describes how Datasmith imports scenes from McNeel Rhinoceros (Rhino) into Unreal Engine. It follows the basic process outlined in the Datasmith Overview and Datasmith Import Process, but adds some special translation behavior that is...

Please note that Rhino allow you to apply modifiers such as “edge softening”. Those are purely render modifiers and are not stored in the exported geometry.

> [@Dataprep is ignoring edge softening (Rhino)](https://forums.unrealengine.com/t/dataprep-is-ignoring-edge-softening-rhino/793728/4):
>
> What versions of Rhino, Unreal Editor and Datasmith exporter are you using? FYI, I did successful export of a cube with soft edges using datasmith: with rhino 7, datasmith 5.3.2 and UE 5.4 P1 with rhino 7, datasmith 5.2.1 and UE 5.3.2 We are yet to update the plugin for Rhino8 and check that nothing has changed regarding the udatasmith export. I did a test of export selected, and you have an option to export only selected part in datasmith, not only in 3dm. It does not look like rhino…

I hope this covers most of you questions.

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