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I was trying to follow the coffee cup tutorial by Blender Guru on https://www.youtube.com/watch?v=fdWUjEMzDhg&t=235s However, I have two major problems with my own project:
1， I couldn't get the right coffee color changing the "Color" and "Density" in Materials -> Volume (Volume absorption), I've also tried changing Base color in Principled BSDF but I got nothing close to real coffee color. Both colors don't work the way I thought.
2, There's no gap between liquid and the cup outer wall (no thinkness of the glass cup). enter image description here

Chong
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  • Blender file attached[link]https://drive.google.com/drive/folders/11vxhEN6v368mkW5bhWUFZB5ix18kMqVt?usp=sharing – Chong Aug 17 '20 at 16:43
  • The glass is supposed to work this way with the Principled, if you don't want this kind of glass you should use a mix of nodes like Glass, Transparent and Glossy. Your coffee seems ok as well – moonboots Aug 17 '20 at 17:17
  • I would try to use mix nodes to give some thickness to the wall, but the color still look a bit off from my own perspective. Thank you for your advice! – Chong Aug 17 '20 at 19:18
  • I will give a try – moonboots Aug 17 '20 at 19:19

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I've given a try for the glass material, it's not completely accurate but in my opinion it creates the illusion. I haven't changed the coffee material itself.

enter image description here enter image description here

moonboots
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  • Thank you for this great contribution! By looking at the picture, the color of coffee looks much better and the thickness of the glass is indeed expressed. I will try out in the weekend (will update) – Chong Aug 20 '20 at 00:46