3D Model Optimization For Faster Lumion Rendering

How to speed up Lumion performance ? and How optimizing your 3D model in Lumion?

 In this article, you will get helpful tips and tricks. How to speed up Lumion performance by reducing the size of your models and improve the speed rendering in Lumion.

One of the essential factors for gating a realistic rendering image is the details.

So, How to reduce the model size?

1st/ Reducing the model’s polygon count:

The most important in this step is to reduce the model’s polygon number without impacting the quality of your model (visual quality).

look at Low-polygon model (on the left), and high-polygon model (on the right), you can easily spot the difference in quality.
Image Source:Lumion.com.

2nd/ Putting models into layers to improve real-time performance :

The quick fist action is to import your models separately to each layer. Don’t import the entire model with furniture, curtains, and other objects.

How to speed up Lumion performance?: Decreasing the size of the 3D points by turning on the layer.
Image Source:Lumion.com.

When importing the terrain of the model, the number of 3D points increased from 17.1 million to 23.5 million.

By putting your models in separate layers, you can control themes easily when you work in a specified model, and you can hide the unwanted layer so that it can help you have better performance. In the image above, you can see the decrease in model size when turning on the layer.

3rd/ How to optimize the 3D model in SketchUp? :

For a very large model (20 MB and More), it’s necessary to use the poly reducer plugin.

In Sketchup, you have many ways to reduce a model’s polygon count. One of the best extension in SketchUp is:

Artisan extension for SketchUp

With this (Non-Free) plugin, in addition to reducing polygons of your model, you can subdivide, smooth, and paint and your model.

How to speed up Lumion performance?: Reducing the polygon model in Sketchup using Artisan plugin
Image Source:Lumion.com.

In the GIF above, you can see Artisan plugin in action, you can choose the percentage of polygon reduction, between 10% and 90%.

The second suggestion extension from SketchUp is:


With this (Non-Free) plugin too, you can reduce the number of faces and polygons of the model quickly without affecting the visual appearance.

How to speed up Lumion performance?: Reducing polygon’s model in Sketchup using the Skimp plugin
Image Source:Lumion.com.

Using simple textures

 The size of texture has a big impact on the model size. For example, a texture whit 16K by 16K can increase Lumion model file by 1 GB.

Hiding geometry

 By hiding the unwanted geometries, and separate your models by layers on Sketchup or Lumion. That helping you improve your model performance.

How to speed up Lumion performance?: Hide geometry in Sketchup
Image Source:Lumion.com.

4th / How to optimize the 3D model in Revit? :

In Revit, there are three ways to reduce the model geometry before exporting it:

Manage the visibility of views

You can turn off the visibility of graphics, and elements in the view.

Export section boxes

 In the large Model, You can export items within the section box only. It is particularly helpful.

Specify the detail level of in model with LiveSync

Using the Lumion LiveSync for Revit plugin, you can determine the level of detail when exporting the model as a Collada file (.DAE).

How to speed up Lumion performance?: Lumion LiveSync for Revit plugin
Image Source:Lumion.com.

You can choose options such as (Insertion Point), (Surface Smoothing) and others to reduce more details.

5th / How to optimize the 3D model in Archicad? :

By following these tips, you can reduce the amount of 3D geometry in your ArchiCAD Model:

  • Using Lumion trees in contrast with ArchiCAD trees.
  • Using Lumion objects in contrast with imported objects.
  • Don’t multiply layouts with different variations that can can result in a high-poly model.
  • If possible, don’t use the Morph Smoothing function.

To estimate the number of polygons in your ArchiCAD model, use the Polygon Counting Tool add-on. This Tool can help you control the number of polygons and display the number of polygons grouped by element types like (slabs, windows, doors, objects, walls, etc.).

How to speed up Lumion performance?: Archicad Polygon Counting Tool add-on
Image Source: Lumion.com.

One final tip in Archicad is to cut a large mesh into smaller meshes, that can improve the performance in Lumion.

6th / How to optimize the 3D model for Other Software? :

No matter the 3D software you are using in modeling, there are always ways to reduce the size of the model.

One more important thing, make sure that your Desktop PC or Laptop has the right hardware requirements for the best experience in Lumion. You can read our article about Lumion Minimum Hardware Configuration for faster 3D rendering