Create a sophisticated optical illusion where a serene forest scene transforms into the face of a wise old man as the viewer steps back. The trees should subtly form the contours of the face, eyes, nose, and mouth, with the leaves and shadows cleverly outlining facial features. The image should be rich in detail, capturing both the tranquility of the forest and the expressiveness of the face, blending natural green and earth tones to enhance the dual perception. Aim for a mystical, enchanting atmosphere that invites the viewer to toggle between seeing the forest and the hidden face