If you export Sketchup models to .fbx format, you will get a perfect model in unity. But you must make sure all the normals of your model in sketchup is right, otherwise you will lose faces in unity.
answered Sep 01 '10 at 04:10 AM
With the Pro version, you can use FBX or Collada, but even 3ds and obj work to an extent. Works fine for me.
With the free version, you can export to Google Earth (kmz), rename to zip, unpack and get the Collada file. I have mixed success with this on Windows, works fine on Mac.
You can also use the LightUp add-on for SketchUp (free and pro) which includes a working FBX exporter and supports the creation of lightmaps. Try the demo. This is not a free application, but the demo is fully functional, AFAIK. LightUp Website
answered Jan 26 '11 at 03:13 PM
If you have pro you could export to a different file format. But no I don't think sketchup is compatible, sorry.
answered Sep 01 '10 at 02:39 AM