People often visit art galleries and museums to look at paintings. There are many famous paintings in places around the world. People call the greatest paintings "masterworks." What makes a painting great? There are many different elements.
First, the lines and shapes that an artist uses are important. Realistic artists make their lines and shapes imitate reality. Abstract artists do not. The way of using lines and shapes is the main difference between realistic and abstract art.
Also, the colors in the painting are important. The colors should go well with each other. Light and shadows are important elements of paintings, too. Light can affect the way you feel. The way that artists use light in their paintings can affect your emotions as well. So some artists may use a sharp contrast between dark and light.
An artist should also have a good sense of space. This means that the painting should not be too crowded or too empty. The painter should always try to find balance in a painting. That makes great art.