Initial thoughts: 1) You could probably stand to add some more color saturation with an HSL filter 2) I might try adding an AO channel and putting the baked AO map back into a fill layer (so you can control it) to get a better shadow in the 'deep' cavity areas of the kernel.
I think I see some white pops here and there on the kernels, which you don't seem to have. Maybe push the brightness on some speckles at the surface, using a restricted noise mask? Also, your model looks a bit even, you might want to push the normal map to get a crunchier volume (thinking of those deeper craters here and there). I agree with aclund3 on the AO map.
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1) You could probably stand to add some more color saturation with an HSL filter
2) I might try adding an AO channel and putting the baked AO map back into a fill layer (so you can control it) to get a better shadow in the 'deep' cavity areas of the kernel.
Maybe push the brightness on some speckles at the surface, using a restricted noise mask?
Also, your model looks a bit even, you might want to push the normal map to get a crunchier volume (thinking of those deeper craters here and there).
I agree with aclund3 on the AO map.