not sure how the engineering/architecture world works, but my guess is were getting different rendos because of different companies proposing their ideas for kstate to pick one.
That's part of it, but even after a particular bidder is chosen there is still a lot of changes/change orders and hammering out of details that still occurs. If the stories from WSC are true about K-State Athletics being particularly anal about details, even what we get on April 26th will still be for all intents and purposes very much a working model. Sure, it'll probably look very close to that when all said and done, but things can change. One rather major detail that comes to mind was when the rendering came out for WSC and that top "floor" was clearly the coaches/press row of glass, and if you look at this thread from that period you can see that, but obviously clearly now there is now a whole other "story" for what I supposed was to be the Camera Deck and it is now not even used as that. Another smaller detail was that the turrets kind of bulging out at the top, instead of being vertical throughout as we see now. Some decisions are purely aesthetic, others financial, others practical. In short, it's a process, as was evident through what we saw in the total evolution of the leaded rendos for the WSC, and now what were seeing here for the NEZ.