What type of enhancement are you talking about, cleaner Render, lighting/gradient, I'm not clear. For a cleaner Render more accurate Render lower Raystep multiplier to .05 and Stepwidth Multiplier to .25 or so or even lower, the lower the cleaner and more accurate. Maybe increase #of Steps and Smooth Normals also. I never use SSAO15 shadows either, usually always SSAO24r they are more normal looking I think. I'd try some Maps for gradients on Normals too, maybe another fractal or picture of a real flower and see what happens. 

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