I can't seem to replicate this, works fine for me. Got a step by step on how to reproduce this form scratch?

(That said, this issue was unrelated to the depth node functionality, the math of the first post just wasn't right)

It is rather flakey, because it's a complex thing, especially when using forward rendering. I'll spend more time getting the depth stuff working right soon! There's quite a bunch of things to do at the moment, so it might take a while

What did you expect to happen, and what happened instead?

It seems possible, but it looks like a very advanced shader involving raymarching etc.
Ask in the forums, someone might have a good idea on how to get started :)
(I'm closing this, as UserEcho is for features/bugs in SF itself. Thanks for the idea though!)

There's no ETA at the moment, but I can prioritize this a bit more :)

I saw that, but I'm not sure the math behind it is right