This is a limited palette painting: Transparent Oxide Brown, Yellow Ochre and white. I used a tiny dab of Cad Red Light for the ear and nose.
It is the most difficult painting I have succeeded in completing for a long while: anything more difficult would have ended up on the garden bonfire, a fate that this one only narrowly escaped.
I thought the hardest bit would be the reflection, but in fact that was quite easy: I painted what I could see of the cat using very thin paint (thinned with turps). It looked weird. I resisted the temptation to fiddle. Then next day I laid a layer of Transparent White thinned with Liquin right over the top and ta-daa! It looked like a reflection.
The hardest bit was modelling the form of the cat to give the illusion of that sinuous, curving body. I wiped it 5 times back to linen before it came good.
I am now exhausted and thinking about switching to an easier career, such as astrophysics.