https://info.sonicretro.org/Sonic_3D..._Drive_Version
This wasn't here yet, I was surprised! Seemingly, composition and arrangement credits for the Mega Drive/Genesis version discovered within its ROM. I'll reproduce:
Spoiler:
Mega Drive Version
The sound test in Sonic 3D: Flickies' Island.
01: Green Grove Zone Act 1
Song by J.Seno, Arrange by J.Seno
02: Green Grove Zone Act 2
Song by J.Seno, Arrange by J.Seno
03: Rusty Ruin Zone Act 1
Song by T.Maeda, Arrange by T.Maeda
04: Rusty Ruin Zone Act 2
Song by T.Maeda, Arrange by T.Maeda
05: Volcano Valley Zone Act 2
Song by T.Maeda, Arrange by T.Maeda
06: Volcano Valley Zone Act 1
Song by T.Maeda, Arrange by T.Maeda
07: Spring Stadium Zone Act 1
Song by J.Seno, Arrange by J.Seno
08: Spring Stadium Zone Act 2
Song by J.Seno, Arrange by J.Seno
09: Diamond Dust Zone Act 1
Song by T.Maeda, Arrange by T.Maeda
0A: Diamond Dust Zone Act 2
Song by T.Maeda, Arrange by T.Maeda
0B: Gene Gadget Zone Act 1
Song by T.Maeda, Arrange by T.Maeda
0C: Gene Gadget Zone Act 2
Song by T.Maeda, Arrange by T.Maeda
0D: Panic Puppet Zone Act 2
Song by T.Maeda, Arrange by T.Maeda
0E: The Final Fight
Song by M.Sets, Arrange by M.Sets
0F: Ending
Song by J.Seno, Arrange by M.Sets
10: Special Stage
Song by J.Seno, Arrange by J.Seno
11: Intro/Panic Puppet Zone Act 1
Song by J.Seno, Arrange by J.Seno
12: Boss 2
Song by J.Seno, Arrange by M.Sets
13: Boss 1
Song by T.Maeda, Arrange by T.Maeda
14: Opening
Song by J.Seno, Arrange by J.Seno
15: Staff Roll
Song by S.Okamoto, Arrange by J.Seno
16: Game Over
Song by J.Seno, Arrange by J.Seno
17: Continue
Song by J.Seno, Arrange by J.Seno
18: Act Clear
Song by J.Seno, Arrange by J.Seno
19: 1-Up
Song by H.Drossin, Arrange by M.Sets
1A: Chaos Emerald
Song by Y.Makino, Arrange by Y.Makino
1B: Invincibility
Song by J.Seno, Arrange by J.Seno
1C: Menu
Song by J.Seno, Arrange by J.Seno
??: Unused Song 1 (Bonus Stage)
Song by J.Seno, Arrange by J.Seno
??: Unused Song 2 (Boss Theme)
Song by J.Seno, Arrange by M.Sets