Another example is seen when a person is observing parallel furrows on a field. An example of a similar illusion is the way that a long hallway or railway line appears to narrow down until the two sides come together at a distance. Despite appearing to converge on one point, the seeming convergence is actually an illusion. These rays appear when things such as heavy clouds, especially stratocumulus clouds, and big objects obscure the sun. Crepuscular rays are rays of the sun that seem to emerge from the general position of the sun in the sky.
