Me too! I think I used a TI85 or 89 but yup! It was awesome learning how to make them after years of playing with them on Fractint, just zooming around.
I miss Fractint. I spent hours playing with that thing as a kid, with no idea about the math behind it (and no Numberphile to help explain it). So I just zoomed and plotted and got really familiar with which particular SVGA modes I could use and which I couldn't.
I still remember discovering Render To Disk and realizing I could save stuff out and open it up in Rainbow Paint... which has been lost in the sands of internet.
