Why is Lumion 8.0 (and older versions) suddenly very slow after importing a SketchUp model?

Why is Lumion 8.0 (and older versions) suddenly very slow after importing a SketchUp model?

Article Details



Poster: peterm
Article ID: 2761
Posted: Fri 09 Feb 2018
Approved: Yes

QUESTION
Why is Lumion 8.0 (and older versions) suddenly very slow after importing a SketchUp model?

ANSWER
Some models that have curved surfaces, such as a sphere, might use an unsupported "projected texture" mapping method which is not supported in other applications.

The result is that the model will become very slow to display and render in Lumion 8.0 (and older versions).

You can verify if such a problem exists by exporting the .SKP file to .DAE format (with 'Export Texture Maps' turned on) in SketchUp and then taking a look at the generated textures folder in the same location as the .DAE file.

If there are hundreds of tiny cropped textures called 'SameName_Number' it means that the objects that are using this texture are using the unsupported "projected texture" mapping method (this often happens when the objects have been imported from a different application).

There is an example of this issue on the screenshot below; 1100 tiny textures from 1 object:



This results in 1100 different materials in Lumion, and the number of different materials in a scene has a huge impact on the framerate.


SOLUTION: THE EASY WAY
To resolve the problem, simply assign a different material to the model that's causing the problem, and re-import the model in Lumion.


SOLUTION: THE HARD WAY
If you can't assign a different material to the model that's causing the problem, there is another way, but it won't work with all models:

1. SketchUp Window menu -> Extension Warehouse -> Type in 'SketchUV' and install the plug-in.

2. SketchUp Extensions menu -> SketchUV -> SketchUV

3. Double-click on one of the problematic objects, and keep double-clicking until you can select the faces of the object. Press CTRL + A to select all of the faces of the object.

4. Click on the 'SketchUV Mapping Tools' button in the tiny SketchUV window.

5. Right-click on the selected faces and select 'Triangulate'.

6. Click on the 'SketchUV Mapping Tools' in the tiny SketchUV window, and select the faces again.

7. Right-click on the selected faces and select 'Save UVs'.

8. Right-click on the selected faces and select 'Load UVs'.

9. Repeat step 3 to 7 for other problematic surfaces.

10. Do a test export to .DAE format to see how many textures SketchUp is exporting. If the number is decent, i.e. below 100, proceed to step 11.

11. Save the SKP file under a new name and re-import it in Lumion.



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