Fur, cat anatomy, and gray-scale painting practice. ^^
This was VERY fun to do! :'D The fur was a bit of a pain, but everything else was great to do! And I'm quite happy with the final result!
Reference- https://m.flickr.com/#/photos/thrumyeye/2076806646/ (Found through Pinterest)
WIP- http://www.deviantart.com/users/outgoing?http://16-shards.tumblr.com/image/99101383313
Program- SAI
Time- 4-8 hours
Art (c) me
YOU MAY NOT USE THIS WITHOUT MY PERMISSION!