It looks too synthetical to me.
I think the bumpiness of the skin looks really well done, but the head looks kind of blocky. It may just be the angle you chose.
are you using mudbox to do all the details on the rex?
Here’s a couple of concept-style drawings I made in Photoshop:
Portal 1 Style
Portal 2 Style
Is that supposed to be ([COLOR=‘Black’]flamboyantly gay) male version? If not, WHERE ARE THE GODDAMN BOOBS?! :hmph: ([COLOR=‘Black’]you fag)
I havn’t gotten around to shading them yet? :3
Boobs aren’t shadows, dude.
Started working on the back side of my spaceship, there’s still so much work to do (big spaceship is big). Been working on the project for so long many parts are now also out-dated and need refurbishing.
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I had to smooth the head so that I could properly sculpt the little details. Once I finish the details I’ll change the shape of the head to give it a more organic look (it does indeed look a bit ‘blocky’). Thanks for the feedback.
At first it looks cool but then you recognize a lot symmetry and it gets boring. Maybe you shouldn’t copy all the details and do more alteration.
You’re not the first to say that, I just copy/paste it to fill the gaps untill I finish modeling the part that’s supposed to be there. Like I said this project is huge and it will take many more weeks to actually get the first stage done. Once I get there I start to add more unique detail.
@ kaikarden
I use ZBrush for the Rex model.
That’s nice man! What’s it for? 
Here’s another version of my character concept: 
https://www.svenzimmermann.de/index.php?page=showpicture&picture=22
Released yesterday. It turned out awesome. I had my doubts. But they’re gone now!
I’ve only recently started surfacing it, so they need alot of refinement, but you get the general idea. Most noteably the angled section on the nose shouldn’t have that curve on it. Jeannotvb what do you model in? You’re models are incredible man. This model is my first real attempt :3
@ Siggs
Nice model there yourself. I use 3ds Max for my mechanical models and ZBrush for the organic models.
Hey everyone, just thought I’d share this with some fellow half-life lovers out there. Thought you guys would like it. It’s a Half-Life Movie Poster Concept. Please ignore the credits text at the bottom, most of that is just random stuff I put in to fill that spot, names of friends and the like.
I’ve posted some other half-life stuff on my Deviantart page: https://espionagedb7.deviantart.com There’s a couple of Half-life related things on there, wallpapers, fan art, stuff like that. Hope you enjoy it. 
looks good, would recommend removing the green splotches in Gordon’s beard. Hit it up with a gold/black brush on color/hue mode.
Nice poster.
Started working on another part of my ship.
I like how you add details in a flat way.