FXRuby certainly gets the 3D done, but it's nowhere near as simple of
VPython, unfortunately... the attraction of VPython is you never have
to think about matrices, projections, cameras and the rest, if you
don't want to, so subsecently for simple 3D visualisation it's
extremely convenient...

so - still looking for a simple 3D library for Ruby.. please - anyone?

thanks

James