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Pleasantly described as twaddle on Eurogamer in 2003. https://www.eurogamer.net/articles/r_republic_pc
Still disappointed!
There is so little information about the Infinite Polygon Engine that my comment above is now the #1 Google search result for "Infinite Polygon Engine" (with quotes), even above that Eurogamer article. Without quotes, my comment is only #2. :)
Compare these claims to the game as reviewed when it finally shipped some 2 years later. It probably did do some reasonably clever and even innovative things but it never really lived up to the hype.
He's a smart guy but his real genius appears to be drumming up breathless and relatively unskeptical media coverage, something else he probably learned from Peter Molyneux who also made a career out of some genuinely innovative games that nonetheless rarely quite lived up to the extravagant claims made about them years before they shipped.