Hi Stefan, I do plan on adding in a system for organizing objects pretty similar to layers.

You can find some previous discussion of this here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=1944.1
http://moi3d.com/forum/index.php?webtag=MOI&msg=2127.1
http://moi3d.com/forum/index.php?webtag=MOI&msg=2150.5

I think it will have some similarities to layers, but there are some pretty big limitations with a traditional layering system (even with hierarchical layers) that I want to try to avoid - specifically the limitation that each object can only be on one single layer.

That tends to prevent doing more arbitrary kinds of grouping with layers. For example if you have a car you can't put the front left wheel on a layer called "wheels" and also at the same time on a layer called "front of car". You're limited to only having it in one single slot at a time....

I think that the concept of a "style" will map more closely to layers though since it will be limited in this same way, and then I want to have a scene browser type thing that allows for some more flexibility than that. The above links have some more info on some concepts for these.

This is pretty much the main area left to finish up before v2 is all complete.

- Michael