Hey, this is great, David! Thanks for posting/sharing. It's really nice for Lisberger to share his thoughts and memories with us about all of this. Imagine what Lisberger and crew could have done if a Tron 2 had been green-lit shortly after Tron 1. After inventing all the characters, techniques, and tools, and "getting warmed up" with all that in Tron 1, Tron 2 could have been very interesting in the mid-80s.
I'll have to look into his "Topeka" book

I didn't know about it.
Tron has definitely been very influential in my life, and affected my career, as well... along with the countless other people generally mentioned in the podcast. Getting to see

multiple times as a kid after it came out was a nice blessing. I would love to work on a Tron movie someday; like a full-circle moment for me, of sorts. Looks like I missed my chance with "Tron: Ares", but hopefully another Tron is greenlit soon after it and it's not too incredibly long of wait between titles. I made my Tron-Sector avatar on the left and some other Tron-inspired 3D tests in the mid-2000s as experiments to see if I could make my own Tron world -- while trying to learn some 3D software as a hobby. Very rewarding experience. (Similar to your Tron VR adventures, I bet you can relate.) I'm a little more qualified and experienced now, so we'll see how things go in the future.
Ha, you asked about grid bug size! That's great. Thanks for asking him, as I know you and I were both curious. His fractal idea/vision is an amazing concept, actually. Very unique perspective. Knowing that, it could explain how while on the solar sailer, the characters were worried about the grid bugs (i.e., the grid bugs could have been quite large, like roughly the size of the solar sailer or a tron tank, for example)... yet in the Tron arcade game and your VR world, they are smaller than the player. I could envision them now also being microscopic, of course, in the environmental circuitry at a nano level. Quite cool
Thanks again for sharing! I hope more Tron fans check it out if they haven't already