The pictures in this series were drawn by a professional artist. The artist developed a mental illness, not as the result of taking drugs. As the illness progressed, he continued to draw pictures of cats. If we look at a series of his pictures, we can gain insight into the same type of changes that are produced by psychedelic drugs.The first picture was drawn prior to the illness. In the second picture, we see the cat is disturbed, and the hair standing up. In the third picture, the background has become part of the figure. The colors are more vivid and the cat is menacing.
In the fourth picture of the series, the cat is still recognizable, but it has become stylized and almost surreal. In the next to last picture, we no longer see a cat but only forms of ears, eyes, and claws. In the final picture, the break with reality is complete. The artist can no longer distinguish what is real from what is unreal.