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The effect I want to achieve: enter image description here

Having glossy shading line (red highlight):

enter image description here

I have tried out with transparent node, and just glass node, it doesn't really works to get the effect I want. Also tried different lighting such as HDRI and spot lighting, I can't get rid of the weird shading of the bottle

Last 2 pics to rule out that it is mesh or texture assign issue: enter image description here

enter image description here

Any idea how I can fix this?

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  • $\begingroup$ You probably want a low Roughness. Also you may want to add more things in the environment to have more things to reflect. $\endgroup$
    – Lutzi
    Commented Aug 1 at 10:20
  • $\begingroup$ I always use a simple Principled BSDF with very low roughness (not 0 because that is unrealistic) and Transmission > Weight set to 1. The rest is just creating environment or having a good HDRI and making sure the Max Bounces are enough (especially Glossy and Transmission). The glossy shading line will not be achieved with a ridiculously high Roughness > 100%, in reality they have bright light screens etc. for things like that. More about the bounce settings in my answer here: Glass render is black for some reason $\endgroup$
    – Gordon Brinkmann
    Commented Aug 1 at 14:00
  • $\begingroup$ The actual coke bottle has a lot of character to the glass - it's more complex than a round bottle, it has a lot of contour. $\endgroup$
    – Allen Simpson
    Commented Aug 1 at 16:23
  • $\begingroup$ @AllenSimpson Yep, that's another point. The question says "the effect I want to achieve" without specifying what effect exactly and where to make compromises. Because to get the same look like the reference the bottle needs the same design features to get reflections in the same areas and you have to recreate a similar studio environment and lighting setup. $\endgroup$
    – Gordon Brinkmann
    Commented Aug 1 at 17:38

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