Good job! A few comments... you might want to check out the perspective of the top of the lighthouse. From this angle, you would be looking down, or at least level to, the top portion. Currently, you are looking at it from the bottom, due to the angle of it's ellipse. This is emphasized by the fact that, right next to the top of the lighthouse, you are looking at the face of the creature directly on level.
Also, there is an illusion that the lighthouse is really close to the creature, and we know there is some distance there between the two that is taken up by the right arm... I would suggest adding some atmospheric perspective on the lighthouse to push it back a bit more so it doesn't look like it is on the same plane as the creature.
Thanks for the critique check. I always have trouble knowing how to handle atmospheric perspective for a night scene. It gave it a bit of foggy look but that is fine for this painting. Anyways, I went back and made those corrections.
Thanks, I was struggling a bit with the perspective because the top portion was above the horizon line. For the atmosphere perspective I was cooling down the colors but I thinking I might desaturated it a bit.
This is, without a doubt, one of the most perfect representations of Cthulhu I have ever seen. From the glowing brain to the squamous, rubbery body that is an intentional mockery of the divine physical ideal, there isn't anything in this picture that captures the essence of Lovecraft's most famous Elder god. And on top of all that, you've not only gotten the number of eyes right, but they are in the correct position, a first that I've seen in any Cthulhu drawing!
Thanks, a couple of years ago I started getting into Lovecraft and Cthulhu and it took me a while to get to this design. Eventually I came across Lovecraft's own sketches which led me to the number of eyes thing. Of course I took some other artist liberties.