"The painting has several features that work together to make this painting particularly memorable.
1) The “material” surface of the water.
2) Hercules’s wagging finger.
3) Venus’s reaching hand."
In terms of making the surface of the water act like a blanket but still retain its properties as water, notice how the vanishing point of the water is quite far off, complete with reflections and ripples. Even where the water meets..." http://highlark.com/index.php/dali-hercules-lifts-the-skin/