What is thick oil painting art called?

Thick oil painting art is commonly referred to as "impasto." This technique involves applying paint in a thick, textured manner, allowing brush strokes and palette knife work to create a three-dimensional effect on the canvas. Impasto enhances the visual dynamics of the artwork, adding depth and dimension while also influencing how light interacts with the surface. Artists like Vincent Van Gogh are well-known for their use of this technique.