They're characters of ~ArgentFatalis - basically the story of a sentient smilodon who mysteriously exists in the modern day "real" world, and works for a secret American intelligence agency who is both his employer and captor.
Thank you very much! I have a realistic fur tutorial out already, but for the shorter fur, I've found using [link] the noisy texture brush is great for really short hair (like on the muzzles) as well as skin texture/pores, gives a sort of a grainy look. For the slightly longer short hair, I find using the hair brush in very very short strokes can work, along with the noise brush and some manual scribbling/hair-by-hair work with a fine brush (1-4px depending on scale).
awesome, I'll try those brushes. only starting with custom brushes, so I'm still trying to find out how to use them and which ones. I used a speckled brush I made in my last painting for fur and it worked well