Hi Grendel, something of that level of complexity might need to be done in separate pieces just in order to not run out of memory.

There is a beginning phase where it is just gathering bounding information on stuff which happens before the progress bar is even shown, I have never seen that step take as long as in your example there though.

If you'd like to send me the model (e-mail a link to moi@moi3d.com) I can try to take a look and see what particular thing is taking so long with it.

- Michael