I've found a video of Overdrive 2 demo running on an emulator [1]. It is curious/interesting how different/broken is in the emulation vs the real hardware.

[1] https://www.youtube.com/watch?v=WJ3AsZp-yTA

For reference, here's a capture from an actual Genesis: https://www.youtube.com/watch?v=gWVmPtr9O0g

And a live capture from the demoparty it premiered at: https://www.twitch.tv/videos/135854774?t=03h45m11s It's interesting to hear the crowd's live reactions.

Thank you for the links. Simply amazing.

The authors of the demo actually mention the emulation... difficulties. It's visible at 03:53:30 in the Twitch video:

    Grief Counselling for emulator
    developers is now available at

    irc.efnet.org
    #titandemo

I would suggest anyone with a history of seizures consider not viewing this link. For anyone else, it is fascinating.