A few guys here use a little package called 'WINGS 3D'. Some use Rhino and C4D. The big guys create their own bump maps and textures, but there is plenty to go through in the FREESTUFF area. Not sure what you mean by 'endlessly repeating primitives on the screen' Bryce can create just about anything using primitives, you just have to have the knack. I can only think of two occasions where I have had to use another app to create something I couldn't make in Bryce.

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All the Woes of a World by Jonathan Icknield aka The Bryster

And in my final hours - I would cling rather to the tattooed hand of kindness - than the unblemished hand of hate...