Need help with blend and lens/transparency

I am working on an Easter egg illustration and have done all the basic stuff easily. I used the blend tool to add volume to it.

But I don't know how to make the same to the decorative elements, so I tried the lens tool TNA, the egg decoration doesn't get that "3D look" of the egg itself.

I want the decoration to be perfectly fit to the egg's blend effect.

Besides, I want the transparency to let me put an image under the decoration, like this:

Any ideas on how can I do that?  TIA.