Well, first off, whoa
It's safe to say I would've considered your first step my finished piece if this were my project.
So much well-done textures! The grass, water, tentacles, fog, clouds... The grass..!
One question though, are the people scared of the monsters? Are they supposed to be running, because they look as if they were taking a stroll, like the monsters were pets. That seriously detracts from the "whoa monster" feel this is trying to convey (I think that's what it's trying to convey, hehe). Maybe you can have the woman stumbling in her hurry to get away, or even a more active pose, hands groping for distance, etc...
On the discussion about the light, I think it's fair to assume that these monsters could move their eyes (aka spotlights
), so if you wanted, you could make it point its eyes at its prey (aka the humansss), and cue
uber dramatic lighting omg behind the humans. It's your call though.
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