Create an image of a whimsical landscape where the sky is filled with swirling optical illusions, blending seamlessly into a surrealist painting of floating islands and flying fish. Let your imagination run wild as you combine elements of surreal art, painting, and optical illusions to create a truly unique and captivating piece.

Design a whimsical landscape that is defined by a sky abundant with swirling optical illusions, which further meld into a surrealistic painting. The painting should depict islands that seem to float in mid-air and fish that defy the rules of gravity by flying. This unique interpretation of surreal art, landscape painting, and optical illusions should combine in a way that it sparks the viewer's imagination and leaves them riveted.