that is insufficient, another suggestion could direct attention toward the relationships between trees, snow and shadows. Only after those hints fail would it be necessary to identify a more precise region. This approach allows the viewer to experience the satisfying perceptual switch rather than merely being shown an answer.
Once everyone has found the face, comparing experiences can be as entertaining as the puzzle itself. Ask which feature appeared first and whether changing distance helped. Some people may report that the face appeared suddenly, while others gradually assembled it from
