Written by Icelandic composer Jón Leifs in 1964, the piece called Hekla, Op 52, requires four sets of rocks hit with hammers, steel plates, anvils, sirens, cannons and metal chains to play.
Hmmm....
Quite well drawn in most respects! I would recommend a thinner brush for outlines, however. The thick, chunky lines give the whole thing a cruder impression that makes it harder to notice how well the rest of it has been done.
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