Realistic Fur - Bump and specular maps
A bump map and a specular map that can be applied to modify-able body parts to make your fuzzy furry avatar look much more realistic!
See high quality 4K screenshots here: http://imgur.com/a/7zCZW
Used a Jex avatar for the example.
I recommend you change the horizontal and/or vertical scales of the maps. In the screenshot I changed the fur's map horizontal scale to 3.600 and the nose's vertical scale to 2.000. You can experiment with the values to fit your needs.
I also recommend to change the specular map's glossiness value to around 200, environment value to around 10-20 and to change the color to something much darker, just a couple of pixels above pitch black in the color selection menu.
Holy Crap
So, this was recommended to me by a friend and I have to say, it is very cool. It's super easy to apply and modify which is nice for someone who doesn't do much modding like me. Awesome stuff.
Good ****ing GAWD
This is easily one the coolest things I've ever seen. It is gorgeous when applied. I can't even put it in words. Most of the time, I didn't have to tweek anything as far as texture scale or rotation and when I did, it was so minor, I barely noticed. I used it on 3 different avatars and it worked PHENOMENALLY. Bravo, really, it's a wonderful thing. I intend to tell anyone who wants it, starting with my boyfriend. If you aren't using this, you should be!