To the artist and all who commented on the anatomy. I'm not sure what you're basing your accuracy of the T-Rex anatomy on; however, it is wrong. With the risk of sounding too harsh, that anatomy isn't even close to Large Theropod and much less a Tyrannosaur. Unlike most of the other posters here, I love the color choice and use of shading, but you cannot call that a Tyrannosaur. Here's a link of a Rex for reference of my comment.

First, the head shape is totally wrong. T-Rex has a longer skull and you put his eyes on the side of the head where an herbivore would have eyes. Carnivores see directly ahead of themselves to help hunt prey and focus. The webbing goes farther into the mouth, but that's a small complaint when the teeth are so few and do not follow the wave pattern used for ripping. Moving to the nose snout, you've inverted the skull curve which sould be a J shape near the eye instead of an inverted hook. At least you got the dip though, the biggest problem with the skull shape is the dip in the top where the tip of the mouth connects the eye. It was not this pronounced, and was more sloped. Elongating the skull will help fix that. And removing the throat sac since they did not have those. Also, no Tyrannosaur was found with bone spikes on its head.

As it stands, this isn't a T-Rex or even a Large Theropod. The anatomy is closer to an ape that got crossed with a big lizard. Keep up the good shading and coloring work though. I can tell from your other works and your artistic vision here that you're a good spriter.