regarding a definitive history of Bryce, that can be found in chapter 1 of the Real World Bryce 4 book by Susan Kitchens w/ Victor Gavenda.

the original Bryce was based on Doc Mojo's work -- Eric Wenger saw a presentation by Mo at a SIGGRAPH of Mo's doctoral thesis, and then Eric wrote the core of Bryce for his own fun.

yeah, it was always lack of $$$ that kept Pandromeda from purchasing Bryce.  also, because Mo had been at MetaCreations and worked on the Bryce code, he had direct knowledge of how difficult it would be to update / maintain that code.  in the programmer's parlance, it is very "crufty."

I had my own ideas on how Bryce and MojoWorld could be integrated, as far as user interface goes, where sweeping out a Parameter Bomb on a Mojo planet would define a "Bryce space," where the floor terrain of the PB could be edited with Bryce's terrain editor, and objects within that "Bryce space" could be manipulated w/ Bryce's UI as far as cameras and objects, etc.... but it was not meant to be...

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Check out my Elemental Hexagons deck, created with Photoshop, Bryce, MojoWorld, and Poser