Just looked at the SpaceClaim video and it looks pretty cool how they are able to provide some parametric modeling. I think this is a great feature for enabling the refinement and 'what-if' types of edits to an existing model. From my brief research, SC doesn't seem to have better 'editing' than 'creating' types of tools.

Just wondering, does MoI and SC share the same underlying kernel technology? I know a little (what Google tells me) about ACIS, Parasolid and CGM as solid geometrics kernels, but really not much more about what kinds of 3d kernels are available. I assume MoI and Rhino3D have the same kernel technology. Is it a NURBS type of kernel, or a solids kernel (or are they one and the same?).

I *assume* surface modelers, like Modo, Lightwave, SketchUp don't use a 3rd party kernel, but maybe they use some open source libraries?

If I'm overstepping proprietary bounds, then please let me know-- I'm just interested in understanding how things work. :)