How can I make the white areas transparent with specs+reflectivities on it?
Any refractive shader will render opaque in Cycles. Use a transparent/glossy mix instead.
Hi sensenku,
this is how I do this type of thing, and I do it super simple:
The thing is, when you need the image to be transparent down in the pipeline (e.g. in some page-layout software or on a web page), you don’t need to calculate any refraction at all. You make the transparent node almost white so it darkens the background just a tiny bit and on top of that you add specular component using Glossy BSDF. It works for me just fine. All transparent foil parts on following visual are done that way.
Happy blending, Petr!
Thank You a lot 