Ugly liquid rendering

[kriomant]

I have created simple polygonal container and added liquid inside using "boundary fill".

Model looks like this:

I have assigned glass material to container and colored water to inner body. But when I try to render it, result is just ugly:

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What can I do to improve rendering?

[donsmac · Accepted solution]

All you have to do is do a push/pull operation on all the surfaces of the liquid, except for the top surface. Push in by a fraction to give a bit of space between the glass and body. The problem is caused by the two objects sharing surfaces of geometry.

[kriomant]

Cool! It works! But is it a bug or not?

[PhilProcarioJr]

@kriomant

This topic has been discussed at length here:

https://forums.autodesk.com/t5/design-validate-document/colored-water-alcohol-amazingly-simple-manag...

[kriomant]

Ok, I have read that topic, now I understand why this happens. Until proper solution is implemented in Fusion, there are basically two workarounds:
1. Emulate liquid by splitting glass at liquid level and assigning material to inner faces
2. Shrinking liquid body

The quality of workaround 2 is fine for me. And it seems that Offset command in Patch env can be used to shrink liquid body automatically. Thank you!