I am coder of the demo and thank you for the comments.

Let me explain some emulator vs real hw issues.

Unfortunately Handy emulator is different to Mednafen to real hw. We needed to focus on one platform as Revision demands real hw proof. So demo runs on Lynx 2 which I have and flash card. But timings are wrong as some fx rely on VBL timings and some not. But maths and Blitter timings are different too on all 3.

So as knowing I will record in the compo video we took mednafen as it has best picture without stuttering sound on my pc.

Demo was shown on Lynx, too.

So in the end it was synced and timed running in mednafen.

Lame but due to compo. As you can not record from real hardware with the shifty display and I don't have a vga mod.

But it's mainly timing.

All fx are realtime. Gouraud, voxel, water, tunnel. Voxel ball. Vectors.

No precalced.