Endless problem: water in the bottle. I have super simple scene: area light from left, background that works as ligh as well and bottle with 2.5 mm thick and liquid.
In general everything looks all right, but in fact I have some problems with it. Bottom of the bottle have some curve and this part appears pure black at rendering. I can increase transmision samples, and this black part starts to acting more natural, but some white artifacts are appearing at the neck of the bottle (no environment map is used).
I`m showing two bottles, both with higher transmission samples. In fact, for the best solution would be use lower transmision but the black bottom is completly unacceptable.
Can you give some advices how to make it right?
And of course sorry for my english.