Well, I think my starfield really displays zooming blobs that do additive blend with each other (not true metaballs but maybe there is not much diferrence visually). It's just not noticable. I use the same zooming and additive blended blob code I used in my 2d blob starfield example. Maybe that gets not very impressive and the stars seem like simple zooming sprites, though making the blobs bigger or more would slow down the GP32. But in my definition I think the starfield is rendering blobs. It would be nice to make a more impressive version with bigger noticable blobs on PC or GP2X maybe..