Most mappers cannot do lava right, but I think you pretty much nailed it there.
To be honest, most mappers can hardly do anything right, so whenever a semi-competent person does things correctly, it's refreshing.
And when someone knows what he's doing like in this case, it's pleasing.

While true, lava in most maps has been particularly cringy at best, even compared to everything else.
And this is because most mappers will first and foremost pick the very first texture that is named "lava", apply it in a surface and lit it up like if they were lighting up a normal room, if they lit it at all, and the result is either lava that is too dark to be perceived as such, or lava with an uneven lighting with dark spots here and bright there, or lava which looks more like an orange soda instead and doesn't look "hot" at all.
Lava must look hot and vibrant, it must look like the lava itself is emitting the light, which is achieved with the right texture and strong lighting in the environment and particularly beneath the lava sheets, and also the right ambient sounds.
Ideally, very light, almost transparent, smoke particle generators should be added as well to reinforce the expected temperature.
And I have seen even experienced mappers utterly failing at this, it's rare to find a map with good lava.
Thanks.
I think I have checked that one, and the only "complaint" I have (if you can even call it that way) is that while those coronas were well placed on the visually hottest spots in the lava, they're a tad too big and static.
But everything else looks very nice and it has a very nice atmosphere to it.
