Here is the work of William Crozier (1930-2011) a Scottish painter who spent years in London and was apparently particularly inspired by what was going on in Paris and the work of Matisse.
I read somewhere that Crozier estimated he made around 12,000 paintings, each in a single session. The color combinations indicate a lot of investigation and looking.
I like this quote from him, "I cannot invent anything – I've got to see it; and it can be for a quarter of a second. Suddenly it's there, and I know there's a picture there. It's got to be seen in nature. I could never be an abstract painter."
On graduating from Glasgow School of Art in 1953, William Crozier, who has died of cancer aged 81, went to Paris, took digs in St-Germain-des-Prés and stayed for a little over six months. He never lived there again but, spiritually, he never departed. "To be in Paris then was to be at the centre of the world," he recalled, and added: "Anyone who was not young [then] and did not sit in the Café Flore or the Deux Magots, where Sartre and Simone de Beauvoir were as gods, simply cannot imagine the excitement that enveloped the young of Europe, emotionally, physically and intellectually."