I have used Export-Collada, and ensured textures+materials+copy were enabled. The resulting .DAE will not import into SecondLife (it says "Parse Error). I can import it into #3D-Builder which says it has errors and says it fixed them, and can see the result just fine – but 3D-Builder has no export. Since m primary purpose is to try to use Sketchup to generate 3D DAE models for SecondLife i am blocked.
Please, add your voice about COLLADA support here:
done. posted a strong supporting post.
You have it already. Save to 3dwarehouse, and a Collada will be generated. Done.