Diego rivera him ge did the painting
The colors are expressing mood, the color black is associated with evil and darkness so it gives this picture an eerie feel. The lines in the way it moves straight and the scream guy is wavy which gives depth to the picture. The other people in the background don't really have a face so it seems mysterious why they are the, but if you look closely the way his foot is going is towards the scream guy, which makes you wonder why he is screaming. His face is also pale and misshapen and that also gives a creepy feel to it.
Illusionism is an approach that offers to explain a phenomenon as an illusion of thinking and perception, and not as a real phenomenon or a phenomenon that really has the properties that it seems to some people. In this sense, illusionism is opposed to "realism" in relation to the phenomenon.
