One of the most difficult things I find to explain to people is how to see the variety of values and colour changes in an object. I did this quick demonstration for someone to try to explain, on paper, the different reflections seen in the mug and the use of colour to make green become green without using a lot of green. Its very confusing for beginners and often their brain works on labelling 'green cup' instead of a mix of shapes and colours.
I know that a lot of this comes with experience and many, many drawings. I am often asked how I choose colours for a drawing. That is another difficult question to answer. Some of my colour choices are intuitive, many based on knowledge of the colourwheel, complementary colours, etc. and much comes with experience.
If you didn't know better, you'd think this was a dead cat. But no, its Tripod on one of the hottest days of the years lying, sound asleep in the grass by the trailer. I shoved him back into the shade without waking him, to finish his nap.
The three little piggies are now three medium sized piggies who love attention and having their ears scratched or to be patted. They make satisfied grunting and snorting noises when you do. I refuse to think of their fate as they are such characters.
and haven't they got just the cutest curly tails?