It's referenced off Jeck Jim's 3D model mod for Sonic Robo Blast 2

also did this one while trying to replicate the last one

heres another I did while fucking around

fun CD time travel I thought was neat

Also here's the early version of open your heart straight from the sonic adventure site which is still up somehow. Totally check it out if you want a small look into sonic team in the 90's sonic.sega.jp/sonicadv/

above what the screenshot shows are downloads for an early version of open your heart and its shocking how good MP3 is. The quality difference is insane and is somehow less megabytes than the WAV or AIFF files.