GENERALLY speaking it is easier to paint thinly than it is to paint with thick rich strokes of color. It is also better to start painting thin and work your way to thick. The reason is that thin painting can be tentative–you can slowly build up the paint layer and adjust color and value very slowly via dry brush, glazing, or scumbling.
In the above painting I have kept the paint film quite thin. This allows for additional paint after the initial thin layer has dried. If it had been paintrd thickly I would have had to scrape off the large impasto strokes using a sharpened ceramic loop tool or a canvas scraping knife. If the surface is too textured all subsequent manipulation becomes more difficult.
For example imaging trying to glaze on a highly textured surface. Parts of the glaze with sink into the clefts of the strokes. The ridges would get less of a glaze as some pigment would naturally sink into the clefts. This is essentially what happens when someone antiques a paint surface when they are refinishing a piece of furniture. In a painting it can give an odd, uneven effect that I try to avoid (although I do use the effect occasionally in my acrylic abstracts).
If you have tried applying thick paint and have not had as much success as you want I highly recommend painting thinly and gradually increase the thickness of your paint. If you look at Van Gogh's paintings in sequence you see that he started painting quite thinly, almost with the thinness of an academic painter, and gradually increased the texture as he matured artistically.
If you find the thick paint defeating your intent form time to time drop back to a thinner style for a few paintings until you get your courage back. Then dive into thick paint once more.
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The ART of THICK PAINT
Non-FictionSpeed your painting journey by knowing the best techniques. Brad Teare expands and adds to the best of his Thick Paint Blog-a site dedicated to painting with thick texture.