In this video I explain how and why I add subtle colours such as pink and yellow to black fur to really help with the realism to indicate the light source on black fur. I'm using Clairefontaine Pastelmat Dark Grey, Faber Castell Polychromos and Caran D'Ache Pablos.
You can see more of my work using the links below:
/ bonnysnowdonportraits
/ bonny_snowdon_fineart
https://www.bonnysnowdonfineart.co.uk