The Nymphs

this is very nice <img src="e.deviantart.net/emoticons/n/n…" width="15" height="15" alt="" title="Nod"/>
and as your own interpretation it works well, but some of the ways the characters stand out and fade out, such as the man's legs fading away are a bit unnatural.
also some of the colors when compared to their individual subjects seem to stand too much alone.
for example, the water lilies. i have a feeling that this happened because you used a digital media with layers.
i have the original on a print in front of me so i can tell you exactly what i meant by the color thing.
notice how most of the image is green? <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" title=" (Smile)"/>
this is reflected not only in the setting and scenery but in the characters themselves. if you look at the original waterhouse image, the man has green reflected in his outfit and well as the women in their skin. in turn, the lilies reflect some of the women's skin and hair tones in their own coloration.
this is a basic law of light. whatever objects are next to each other, reflect bits of one another. this is how the artist portrays the illusion or harmony between his object within his paintings. otherwise, the objects in it look simply as if they are each on a different layer in the painting and each trying to steal a bit of their own limelight instead of working together to make the painting as a whole successful. (in traditional media painting this would be called local blending)
something else i see is that in the original waterhouse image, there is a clear light-source. it doesn't affect the women as much because they are supposed to be portrayed as more mythological creations (nymphs) and they are given more of a celestial glow. such as the milky white skin of bodies never harmed by the sun.
the man's skin is much darker (more olive too since it is directly reflecting its surroundings) and there is a clear shadow in his face area telling the viewer where the light source is coming from.
you on the other hand have everybody up there aglow... thus lessening the impact of the divinity of the females and actually bringing more attention to the man since he also has the the only unlike colors in the whole composition.
otherwise, i fell you have done a more than wonderful job on the background. Waterhouse doesn't seem to have much of one back there so i feel you've actually done the image more justice with it.
eitherway, great work! <img src="e.deviantart.net/emoticons/h/h…" width="38" height="15" alt="" title="Hug"/>
Artmaking is long and hard journey that requires a lot of patience and practice, but once all of that it out of the way, the end results are most satisfying <img src="e.deviantart.net/emoticons/n/n…" width="15" height="15" alt="" title="Nod"/>