Kind of a missed effect in the photo is the realistic water... Actually it's a gloss resin. Looks very wet in person, but the light isn't right what with the rain/clouds we've had all week.
The grasses and shrubs look good, but the water looks fake. A pool that small would be shallow, so much of the color would be what shows form beneath. More browns, blacks, and greens would look more realistic.
Other than that, good work.
Vote
