LuxCoreRender Forums

hm, it only works in your scene with artificial lighting. When I use sun and sky and no clamping I don't get much sun inside the glass I would expect something more like this

hm, so it doesn't work...

here's your juice in glass as you set it up but this time with sun and sky here it is juice object only and here it is juice only but this time architectural glass so only the last one shows proper gradient from sunlight inside the volume (closer to reference photo in my previous post)

scene with sun and sky

i can confirm the strange look under sun and sky. maybe Dev give an input when they're back.

My version: Only lit by Sun + Sky.

provisory wrote: ↑Wed Aug 14, 2019 6:47 pm My version:
juice.jpg

Only lit by Sun + Sky.

Thanks, I'll check it in the morning I'm not at pc atm.
But now the refraction looks a bit odd near the top and the very top still kinda looks darker than I'd expect under direct sun...

How is it modelled? what's the glass shader like?

You can tweak it further, on my slow computer it is hard to find the perfect settings. But keep in mind, that for commercial beverage photos they use back lighting, so without that you wont get those punchy results.

FarbigeWelt wrote: ↑Wed Aug 14, 2019 10:35 am Camera volume should be set to air too. Automatically detection makes nonsense sometimes, with very strange results due to wrong refractive index ior or other settings.

Camera volume should be disabled, because it makes nonsense all the time.

lacilaci wrote: ↑Wed Aug 14, 2019 12:49 pm here's your juice in glass as you set it up but this time with sun and sky

This juice's volume has priority 0, the same as glass. Glass should have higher priority. Also, juice ior = 1.5, which is uncommon for juice (unless it's 85% sucrose).

provisory wrote: ↑Wed Aug 14, 2019 6:47 pm My version:

Your volume priorities are also both 0.

juice_sunsky.blend (with volume priorities and ior fixed)
Path+Sobol ~
Bidir+Metropolis~
I like bidir version better. It is three times faster and ten billion times better.