Quote - it's .SOB and tS 4 can read it... dunno about 5/6/7... and since MS killed Caligari...

It may be the same as .sob, but all of them were originally saved with the extension .sobj.  I do have some older versions of Truespace laying around somewhere, was hoping to find something a little smaller to handle the task, and hadn't used Truespace since moving to Win7 64-bit.  I suppose they should still work if I can find the disks.