De Ja

I wish to plot the steradian similar to what is found on wikipedia. I would like to play with light projections using this object to simulate energy transfer and heating. Can gnuplot make this type of plot if so, can you provide a working example for gnuplot 6.0? Or, make suggestions on how to work with 3d geometry in gnuplot, a textbook would be nice. Or, suggest related software not as desirable.