When the camera is looking back at our planet Earth, it's the tiniest of specks somewhere out there in the universe. So we do have a new sense of proportion. Of course the volcanoes and the magma under us just remind us of that.
Of course the entire planet Earth consists of magma under us, and only the very inner-core is different.
For a film I shot on the most difficult mountain on God's wide earth in Patagonia for a sequence where there was high probability some digital effects were needed, somebody made storyboards and I quickly ignored them, after half an hour I ignored them and I never used any digital effect.