Apart from the theory of color and many other virtues that one must possess, the study of the masters of painting goes through know the shape of his strokes and brushstrokes to find that throwing one diagonally in certain shadows can offer one sense or another in that depth that is wanted.
A good example to understand the importance of the line and how one well given with a good wrist flick You can save minutes searching for the perfect shape by looking for another way to find the same result. 'sol 23' by Conrad Jon Godly is enough for us to understand how to give the perfect shape to the peak of a mountain in which the projections are usually a common denominator.
Conrad perfectly defines that mountain by using a lot of oil painting to give the appropriate shapes to those tips and features. The only thing that will surely take a few months for that oil to dry. That said, as a curiosity to say that some oil paints take many years to dry completely.
It is another of the skills that must be achieved after applying an oil coat, it is wait until almost completely dry to apply another. Some, in a week they are ready to be able to paint again, while others with two days is more than enough. Anyway, it depends on the oil and how thin the layer is to wait for it to dry.
Here the painter use a large amount of paint to produce that effect in texture that helps to even offer an optical effect that stands out from the canvas. You have your website from this link to access the rest of his painting where he plays a lot with strokes and texture as you can see.
Another painter that plays with the strokes.