List three different techniques artists have used to convey the illusion of deep space on a flat, two-dimensional surface

What will be an ideal response?

Answer: The ideal answer should include:
1. Objects closer to the picture plane are sized larger than objects placed in the distance.
2. Overlapping objects create the illusion of one existing in front of the other in space.
3. They employ a vantage point looking down on a scene from overhead.