Two examples make this very clear. The first is the work Scarlet Sunset by Turner that was painted in the years between 1830 and 1840. It is quite small, but very beautiful.
When the French painter Monet was in London in 1870 because his country was at war with Germany, he saw this painting and it inspired him to paint this:
|Impression, soleil levant 1872 (impression of a sunrise)|
So, perhaps you can say that without Turner, there would have been no Impressionism.
The second example is also quite stricking. When Turner set up a painting, he painted the colours he wanted to use in watercolours on the canvas. These are known as colourbeginnings and we have a few that Turner started, but never finished into a painting.
|Colourbeginning by Turner|