I think it all looks flat... the shadows should be blurred more so its not so pronounced if that makes sence xD The blending of the grass was a neat idea but I dont think you pulled it off nor with the lake, that rhino is HUGE compared to that boat but yet the grass on its feet is like the length of that boat... the rhino needs some shadows unless you have a light source from behind it. Work more on the blending and it could turn out to be a great piece!
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