The walkers/zombies from The Walking Dead have gotten noticeably more disgusting and brutal looking from Season 1 until now. It makes sense. They've been getting worn down over time and now they're truly gnarly and undoubtedly smelly.
Here's what producer Greg Nicotero had to say about it to The Hollywood Reporter:
"We're doing a few things we haven’t done before, which is digital augmentation of couple of walkers. We're moving noses and putting a cavity there. Taking the area underneath the ribcage and shrinking it down. Kind of Bernie Wrightson style. That stuff is what makes it more exciting because it gives us more opportunities."
TWD showrunner Scott M. Gimple doesn't want the walkers to get too thin or skeleton-like. Here's more from Nicotero:
"Every season we sort of refine [the walkers]. We refine the teeth even more and we just keep changing it up, and every season it’s been different and we just keep pushing it a little bit more. It’s been really fun. We sculpted full muscle arms and then we added sagging flesh off of them as everything is about to drip off. [Showrunner] Scott [M. Gimple] has one very specific thing that he is conscious of, which is that it can’t be a Ray Harryhausen. It can’t be a walking skeleton. It always has to be muscles. It always has to be something that is motivating the movement."
I'm ready. October 11th couldn't come soon enough.