Here are my progress with my dragon.
For those who are interested in the textures used for the brush .
For the scales. Using a non-seamless texture as such was quite tricky. I recommend for the brush settings to use Mapping=> Area Plane, Stroke Method => Airbrush combined with the Rake option (to follow along the mouse with a correct rotation). Dont forget to change the Rate of the Airbrush and the strength.
I also find out that textures that are too dark don’t give a result as clear as lighter ones.
For example this one give me a more messy result than the previous one.
For the leather, belly part
Anchored Stroke method, with very little brush strengh.