Hey, nice work. In the reference it looks like the skull protrudes father out from the pad than you have it. In the reference there are hints of the side of the skull... almost as a blending method.
Nice work.
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"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"