Author Topic: Revit and Revit LT: How do I Export a Model?  (Read 33030 times)

Revit and Revit LT: How do I Export a Model?
« on: November 29, 2010, 11:16:44 pm »
November 29, 2010, 11:16:44 pm
Revit: How do I export a model to Lumion?

The best way to export Revit models to Lumion is via our dedicated, free: Lumion Plug-in for Revit.  The plug-in includes both the exporter, and Lumion LiveSync® for real-time preview of Revit models in Lumion.

The exporter supports Autodesk® Revit® 2018, 2017, 2016 and 2015, and Lumion 5.7.2, 6.5.1, and newer.

The current version of the Lumion Plug-in for Revit is v2.0.3, and is installed in the following ProgramData folders for Autodesk®.

For Users of Older Versions of Revit or Our Previous Revit To Lumion Bridge:
See the same Revit plug-in and exporter page (scroll to the bottom of the page): Revit To Lumion Bridge.
  • Revit To Lumion Bridge is no longer available from the Autodesk App Store.
  • Revit To Lumion Bridge 1.6.1 works with AutoDesk Revit 2014, 2015, 2016 and 2017 (Lumion 6 and 7).
  • For AutoDesk Revit 2012, AutoDesk Revit 2013 please use our legacy Collada Exporter.
Version 1.5 (and earlier) of the Revit to Lumion Bridge plug-in would remove unicode and punctuation characters from Revit material names which caused problems for users in China, Japan etc. This limitation was fixed in version 1.6.0.

If you have a Revit model that was imported in Lumion with version 1.5 or earlier and you re-export it with version 1.6.0 or later, some material names can no longer be matched up which means that Lumion does not know which surfaces to re-apply the Lumion materials to. The result is that materials will appear to go missing when you re-import the model.

For that reason we recommend the following course of action:
If you have used version 1.5 or earlier when importing a Revit model, you are advised to finish your projects with this version of the Revit to Lumion Bridge plug-in. When you start on new projects you should upgrade to the latest version (currently 1.6.1).

Alternatively, you'll need to re-assign the Lumion materials to your Revit model after it was re-imported with version 1.6.0 or later.

You can re-assign the Lumion materials by saving/loading each material via the Wrench button in the top right corner of each material panel.  See our Knowledge Base Article: How do you save and load materials?. This will make your Lumion projects future-proof when newer versions of Revit To Lumion Bridge plug-in are released.

Autodesk Revit:

If you select option Skip Interior Details then these Revit Categories are skipped:
  • Casework
  • Communication Devices
  • Data Devices
  • Duct Terminal
  • Electrical Equipment
  • Electrical Fixtures
  • Fire Alarm Devices
  • Furniture
  • Furniture Systems
  • Generic Model
  • Lighting Devices
  • Lighting Fixtures
  • Mechanical Equipment
  • Model Text
  • Nurse Call Devices
  • Plumbing Fixtures
  • Security Devices
  • Speciality Equipment
  • Telephone Devices
What is the difference between the Base Point and the Survey Point?
There are two axis systems in Revit projects:
- Base Point: Internal axis system.
- Survey Point: Axis system based on a geodetic survey.

In Revit, you can mark the Base Point and Survey Point in your project. The Revit to Lumion Bridge exporter settings let you define whether you want the Base Point or the Survey Point to become the insertion point in Lumion.

Support for True (Geographic) North (RTLB version 1.5 and later):
  • If you choose "Base point" as insertion point, then project north is taken into account.
  • If you choose "Survey point" as insertion point, then true north is taken into account.
Revit LT

For Revit LT you can't use the Revit To Lumion Bridge add-in and should use the built-in DWG exporter instead. Please note that textures are not transferred correctly from Revit LT to Lumion due to AutoDesk limitations in the exported DWG file.

Make sure you click here and install the DWG to Lumion Bridge.

Please also ensure that during export you selected an option "Export all properties BYLAYER, and create new layers for overrides". See video tutorial below.

Autodesk Revit LT:

Alternative method:
Alternatively, if you have 3D Studio Max installed, you can use this method:

- Export an FBX file from Revit.
- Import the FBX file in 3D Studio Max.
- Prepare and export the model as described in this post.
- Import the Collada (DAE) file in Lumion.

Frequently Asked Questions

I can't assign a Lumion material to individual surfaces?
Lumion will always combine surfaces that use the same material in Revit. If you want to assign a Lumion material to a specific surface, you must assign a unique material to that surface in Revit before exporting the model.

How do I update the model in Lumion after making changes to it in Revit?
Use the Re-import model function in Lumion.

What Does the Geometry Optimization setting do?
Before the plugin exports an object from Revit it needs to tessellate it (divide the model in to triangles).

But the default built-in Revit tessellator has a problem with thin, long objects (railings, frames etc).  It generates too many triangles.

If you turn on Geometry Optimization then, only for the given object categories, the exporter tries to tessellate it differently to get optimal smoothing with minimal triangles, instead of the built-in tessellator .

However, occasionally there is a drawback:- sometimes UVs are incorrect.

It's better to avoid this option, unless your Scene generates too large a DAE file (after reducing it using lower Smoothing Accuracy settings).

Re: Revit and Revit LT: How do I Export a Model?
« Reply #1 on: November 20, 2017, 05:45:47 am »
November 20, 2017, 05:45:47 am
DWG file format compatability:

If you have Revit 2018 or Revit LT 2018, and Lumion V8 then export to DWG 2018 or DWG 2013.  Use DWGToLumionBridge2018 for Lumion 8.

If you have Revit 2017 or Revit LT 2017, and Lumion V6.5 or V7 then export to DWG 2013.  Use DWGToLumionBridge2017 For Lumion 6.5 and 7 (includes V7.0/7.0.1/7.3/7.5).