Fire crawling below a surface is entirely unique and reaaaally difficult to find good references for. It took me a few years of searching sporadically, but eventually Eben pointed me to this incredible video:
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That is beautiful. I bet a Vr game where your escaping from a burning house would be awesome - (and terrifying).
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This is gorgeous! Thanks for the post!
Incredible reference, thanks a lot for sharing! 
It’s always so interesting when real-world references like this look so surreal
This is crazy good material, tahnks a lot for posting!
There’s some good reference in this video of ceiling fire from the side too (you may want to skip around, it takes a bit to get going)
Great reference. Also a classic example of reality looking nothing like I imagined it should!