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I have been making a glass bottle animation in which the bottle is tilted sideway and supposed to rotate about the Z-axis. The liquid inside the bottle is luminous because I want to achieve a magical vibe. However, after I am done with the animation I realized that there is always an angle where the lighting of the liquid cannot pass through the bottle, which results in inconsistent lighting when the bottle is rotated.(as shown below) enter image description here enter image description here I have done some simple troubleshooting and realized that after I disabled the glass bottle, the liquid itself behaves properly as I expected. I have tried to scale down the liquid body and shift it more towards the center part of the glass bottle but the same issue still persists. Now I am totally clueless on how to solve the issue. Below are the material settings of my glass bottle and the liquid body. Glass Bottle Material: enter image description here enter image description here Glowing Liquid Material: enter image description here Not sure whether the information provided is sufficient, but I would be glad if anyone can offer any clue on why there is such a problem and how I am supposed to resolve this. Thank you very much.

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    $\begingroup$ Hello and welcome. Please share your blend file blend-exchange.com $\endgroup$
    – Harry McKenzie
    Commented Jul 8, 2023 at 7:07
  • $\begingroup$ Try lowering the IOR of the glass down to 1.25 or so. It might make the glass a bit less realistic, but it should allow more emission to pass through. $\endgroup$ Commented Jul 8, 2023 at 21:30

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