Sonic Adventure (Dreamcast)

I've seen this first city area many times, but man, this game is still incredibly silly. I'm trying out the 'flycast' emulator. It worked without any configuration. I'm seeing a white triangle clipping through Sonic's eye, I wonder if that's an emulation error? It seems very unfortunate.

In the flycast Settings:Video:Transparent Sorting should be set to 'Per Pixel' to fix the eye problem.