Final answer:
The primary methods used to imply depth in The Meeting of St. Anthony and St. Paul are linear perspective, atmospheric perspective, and shading and variations in value.
Step-by-step explanation:
The primary method used in The Meeting of St. Anthony and St. Paul to imply depth is linear perspective. This technique involves the use of parallel lines that converge at a single point on a horizon line, called the vanishing point. By using this method, the artist can create the illusion of depth and three-dimensional space in a two-dimensional painting.
Another method used to imply depth in Renaissance paintings is atmospheric perspective. This technique involves making objects in the distance appear paler, bluer, and less detailed than objects that are closer to the viewer. By using these visual cues, the artist can create a sense of depth and distance in the painting.
Lastly, the use of shading and variations in value can also create the illusion of depth. By using darker colors to create shadows and highlights, the artist can give the impression of three-dimensional form and depth in the painting.