Author Topic: Revit and Revit LT: How do I Export a Model?  (Read 34877 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 from Revit to Lumion?

The best way to export Revit models to Lumion is via our dedicated, free Lumion Plug-in for Revit.

Please click here to download it.

Revit RT: How do I export a model from Revit RT to Lumion?

For Revit LT you can't use the plug-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:

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

What does the 'Skip Interior Details' tickbox do?
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.

Why can't I 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).