Those are really impressive very impressive indeed. I have an older system that I built going back perhaps 6 maybe 7 years now and going to build a new one hopefully by the fall but I upgraded my graphic card to mid level card that my system could support and that improved my render time dramatically. My Floral Starball render that I will add below would have normally taken 6 or 8 hours to render with Fine Render Settings in Bryce took 28 minutes to render at 1800 x 1600 resolution and it was something I made in Blender and then imported into Bryce for a abstract look 

Lobo3433

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