spot varnish

I’m wondering about the best way to create a spot varnish area on a label. The varnish crosses different inks on the label. The label is textured with a layered material with image masks for all the different inks. The ‘Flavour Matters’ stamp should be a varnish.

I can’t seem to get it working, it always looks opaque, it’s supposed to look transparent and glossy with a slight bump.

Anyone done this successfully?

Duplicate the label material & make it glossy.
Stack the new glossy label on top of the base material.
Add the area you want as a varninsh as a alpha channel in the label art - then load that alpha into the opacity slot to mask the area out.
Copy the alpha into the bump channel and give it a small blur to give it some depth.

Oh - on second reading I see you’re using a layered material which complicates matters.
So actually it will probably better to duplicate and slightly offset the label geometry. Add a glass material with refraction set to 1. Opacity and bump as previously described. Result attached.

that looks great, thanks very much

for it to work right, its textures should only be in bump and reflection channels
would help a lot if you’d supply a tester, an exemplary file or at least show how your shader/material is constructed