I am still on the demo version and I have to say I still miss a few things, like the ability to set an IOR for the reflection on glossy materials, 0 seems to reflect in every direction, but it seems I can't set any value from 8 to infinity. Having a specular value of 0 still gives me reflections, how is this ? A specular material doesn't have a second index for the reflection, and the roughness seems to be whats called glossiness or bluriness in other engines, but acts a bit weird, I understand values aren't linear, but when droping a texture in the slot I don't seem to get it right, and the invert checkbox acts a bit strange.
That said, I was reading this post and tried from it to get a wax material.
It is a start but I am not quite satisfied with the result, I would like to have a crisper reflection as on a fresh clean candle for instance. Here it looks more like those candies you eat while waiting ages with other render engines
Anyway, to get it look less like glass I had to increase a lot the roughness ( 0.245 here ) which kind of blurred reflections a lot as well. Is there any way to separate roughness on reflection and refraction ? Maybe a little node trick, plug a shader into the reflection slot or something.