When you try on something, you have to ask yourself, 'How many ways could I wear this? Could I wear it to work? To dinner or drinks? Will it span the seasons' If you have to think too hard about those questions, then skip it.
A painting is above all a product of the artist's imagination, it must never be a copy. If, at a later stage, he wants to add two or three touches from nature, of course it doesn't spoil anything.