Some initial doodles, done before my Phil-induced epiphany of 'oh hey, no interiors'. I inverted this one and the next one to make them easier to see, but the last two read badly in white-on-black so I left them as-is.
Starting to drill into the pearl grotto. The description of arches like Tuscan architecture caught my eye, so I really tried to make the arches/pillars the focal point.
And the petrified forest again. Starting to look at putting the trees into a scene, but it's still a bit clunky so I'll have to work on streamlining it.
And some thoughts on the coral cemetery. The idea of it being in some kind of basin isn't actually in the text, but it struck me and I had to get it down. I like the idea of it being some kind of sanctuary for the dead - Arronax specifically refers to the dead resting safely there - so enclosing it somehow could help that.