Still working on the "Neo-Retro" illustration style, in this case an attempt to make it a bit cleaner and more "commercial", if I may make such a confession. But it is illustration, after all, and illustration exists in a commercial universe.
The background is a mix of watercolor and photographic collage elements. For example, the rim of the swimming pool is a photograph of a concrete surface.
One might think the young lady enjoying the pool (and yes, if you see a resemblance to Roy Lichtenstein's "Girl with a Ball", there may be one) is a little on the pale side, especially for such an obviously ardent Sun worshipper. Her whiteness balances the great expanse of white at the top of the image.