Syntonic Dentiforms redux

Some 22 years ago nesnausk! made a demo Syntonic Dentiforms. That was 2004! So of course the demo was written for Windows, 32 bit, Direct3D 9, used D3DX Effects Framework, and was compiled with Visual Studio 6. It used fairly-new at the time pixel shader model 2.0 (heck yeah!), but also had fallback rendering paths for shader models 1.4 and 1.1. Good times.
Now I took the source code of it, looked at it in horror, and rebuilt it for current platforms.