aes

Well, with the newer optional typing, it became def foo(name: Optional[str]) -> Optional[str]: ... and now def foo(name: str | None) -> str | None: ... (No need to import Optional) It's quite nice.

As for Rust, recall that Result is also a very similar union type. I think a lot of the aversions people have had to static typing have mostly just been about poor expressiveness in clunky type systems.

Actually, you know what? I think Lua-style single argument function calls would be awesome for all kinds of quasi-literals, but sure Path should be built in.

I... discovered that it works if I use a plane mesh and just position it manually. The conclusion then has to be that there is something screwy with how Decals get their textures. Maybe there's even a bug involved? Should I try to make a minimal repro?

I was talking to some people from a company that makes an eye-tracking thing and apparently it's really hard to do with precision, so it's unlikely that any hardware you're willing to pay for is going to do what you want.