I\'m new to Planeshift (2 days!) but I\'m keen to help out with (simple) 3d contributions. (I\'m posting this in newbie help because these questions have probably already been answered

)
I\'ve checked out Laanx\' Wheel of Wishes already. I do, however, have some questions about contributing. Is there already a guide out that answers the following:
1) What scale should 3d objects be contributed at?
2) Must all objects be texturemapped, or will materials suffice (where appropriate)?
3) Is transparency/translucency supported? If so, is it just for texture alpha-maps or also for materials?
4) Should/Must all meshes be completely triangulated/quadrangulated before submitting?
5) Where/how should contributions be submitted? I\'ve already created a LWW account... (ignore this question!)
I sincerely apologise if the answers to these questions are already available, but I have had a good look for them. And I didn\'t want to email Orogor or blueCommand because they probably get emails like this all too often.
Thanks,
Kastirin
Edit: Ooops, I seem to have discovered how to submit meshes, but my other questions are still applicable =)