I kinda want to get something off my chest about Gran Turismo from how they do their own games, the screens show most of the game in edited form or not. We can hardly tell if they are genuine features of the game of some kind, we need all kinds of menu shots and other menus as well. Maybe well look at their own studio more just to see what is going on at Polyphony's HQ.
From what I can gather about GT's history from all the beta threads, which were almost all made by
@Xenn and some others when I put them up it shows partial development on how Polyphony handled their demos, just to see what the public thought about them. Even some E3 demos like GT: 2000 had some good screens, and was a GT2 tuned for the PS2 just to test the new hardware capabilities. They worked their buts off just to get GT1 & 2 to work properly without any issues. They only had a year to complete GT2, and you know how bad that turned out to be back then, from what other modders did in the 90s is that they helped Kaz fix the problems that GT2 had, so testing the game would have been the way to go, but I feel like it's Sony's fault. Hear me out guys, but it just the way how I think it. Sony pushed Polyphony to release GT2, but they could not have focused much on the new hardware that was out in 2000. So, Sony pushed GT2 to be released on Christmas of '99 to get a profit, and I bet Kaz would have liked to have more time to perfect his game to be better, and we can tell that by the betas easily.
Now onto the interesting part about GT5's development cycle, now original it was called "Gran Turismo: HD", which was going to be used as, I guess a "Free to Play" style game to where you buy courses and cars for money, bad system to me. It would turn down many of the former fans, etc. It looks like a pretty cool game though, and the screens aren't half bad for being an upgraded GT4 for test purposes. Well, GT5: Prolouge did not start as a huge mess, but it was a demo. There was 3 tracks that you could not be used, such as Tsukuba, Nurburgring, and the Le Mans 24h track. It was not rushed, and I did not noticed this as I played through GT: HD Concept and GT5: Prolouge is that the games were two years apart, even when GT5 was released it was in 2 year intervals. I think they kind of rushed it through, and deleted key features that the PS3 could handle. It just does not seem right to me, I wonder if Kaz is limiting the other developers who want to make these games better.
Here are some topics you may want to visit about the beta stuffs.
https://www.gtplanet.net/forum/threads/xenns-gt-concept-research-topic.275216/
https://www.gtplanet.net/forum/threads/searching-for-evidence-of-hidden-things-gt1-version.233277/
https://www.gtplanet.net/forum/threads/searching-for-evidence-of-hidden-things.78938/
https://www.gtplanet.net/forum/threads/xenns-gt3-research-topic-might-not-be-56k-friendly.240941/
https://www.gtplanet.net/forum/threads/xenns-gt-psp-research-topic.269582/
https://www.gtplanet.net/forum/threads/xenns-gt4-research-topic.251394/
https://www.gtplanet.net/forum/threads/gran-turismo-4-prologue-hidden-features.283725/