How to Update a SketchUp Model in Lumion
How to Update your model so you don't lose all your materials and objects. You just got a bunch of design changes from your clients. Don't panic. We can fix it. Luckily the guys at Lumion put in a feature that allows you to update your Collada file.
You'll even find out how to export your file in the first place. Best practices that is.
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http://lumion3d.com/free/