I can't seem to tell where the light source is. Each individual grape seems to have some pillow shading on it making it hard to tell. The steam also looks like the handle for a stamp. Perhaps curving it a bit more would help it look for natural.
Also, if you are going for a natural look for the grapes are far from that purple. Something around 8e3e44 would be good for a more natural red/purple grape.
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I can't seem to tell where the light source is. Each individual grape seems to have some pillow shading on it making it hard to tell. The steam also looks like the handle for a stamp. Perhaps curving it a bit more would help it look for natural.
Also, if you are going for a natural look for the grapes are far from that purple. Something around 8e3e44 would be good for a more natural red/purple grape.