A little off topic, but: If you like OpenGL, you could try out WebGL in a browser. Yes, you'd have to use JavaScript, but you could still do a lot of the data munching in Perl and push data on thy fly to the browser side using Websockets+JSON.It's easy enough for a single threaded Perl script (or fork-on-demand if you so choose) to serve multiple clients, so you can even push you real time data to multiple computers all at once ;-)

I can't help you with 3D graphics stuff, but if you ever want to go the route of networking, i'm certainly one of the brains you can pick ;-)