Something to bear in mind is that bones in a model loaded with Blitz3D are actually blitz3d pivot entities.
I'd suggest experimenting with some of the free models available at http://www.psionic3d.co.uk/cgi-bin/imageFolio.cgi?direct=Free%20Stuff/3D%20Models . I think some of these models have issues with fustrum culling due to where the center is placed, so you may encounter some visibility issues with them.
I'd suggest experimenting with some of the free models available at http://www.psionic3d.co.uk/cgi-bin/imageFolio.cgi?direct=Free%20Stuff/3D%20Models . I think some of these models have issues with fustrum culling due to where the center is placed, so you may encounter some visibility issues with them.