This has now been fixed in Alpha 0.20 :)

This has now been fixed in Alpha 0.20 :)

That's an interesting issue! It really should get the distortion too. I'll look into this :)

In the meantime, you can use the View Pos and World Pos, to check the distance between them, and add fog accordingly

I would say no, it's not possible, due to how the fog system works, unless you make it manually. But there might be ways, I'll have to do some research :)

Double-sided shaders are a bit of a mess. I don't think there's a bulletproof way of detecting which way a face is facing which way :(