This is awesome. It reminds me a lot of the Nether from Minecraft.
Hey that’s pretty good I mean it looks perfect as a collector set if G3 did happen.
Awesome work. But what type of material is this supposed to be made of?
dunno some kind of brown stone.
For some reason I thought it was supposed to be wood, which made me sceptical…
Sir! The castle is burning!
What?! That’s impossible! It’s made of wood!
… Sir?
Wood floats on water, so it obviously floats on lava too.
… y- yes sir…
You, sir, have won the comment of the day 
I don’t think the brown fits, it does come across a bit wood-y, I think black with metru red highlighting would work better personally.
Works well with Nether Fortress set
I think a darker red would go better with the structure itself, but this is otherwise well done. I like that you decided to implement the environment itself into the piece, adding a bit more intrigue to the overall design.
What if you swapped the colors for the fortress around (black to red, red to black)?
I love this with all my heart, really and truly. The colours are simple, clean, and ultimately amazing looking.