Sharlybg wrote: ↑Wed Aug 19, 2020 6:44 pm
You clearly miss
a correct lighting plus good reflection.just add
a nice indoor Hdri it will look more realistic.
Martini wrote: ↑Sun Aug 23, 2020 6:44 am
... Check that you have
enough light bounces (I recommend at least 32 or 64, probably even higher for a scene like this), ... and make sure you have
something bright to reflect ... At the moment it looks like nothing is
above 1.0 brightness, this is not realistic for reflections.
For an additional touch, you can experiment with
internal volume absorption on the glass.
B.Y.O.B. wrote: ↑Mon Aug 24, 2020 1:05 pm
It looks like you might be using the
glass material to color the liquids?
Use
a clear volume with absorption color instead for physically correct absorption (the "colored glass" preset gives an example).
Judging from the shadows, it looks like you have way
too many lights for a nice lighting. Try only two lights for a start.
... it also makes sense
to improve the environment if the glass does not appear realistic. The easiest way is to
use an HDRI of a room instead of a 3D-modelled room, ...
HDRI
Use of an indoor HDRI is a very good input from all of you. Thank you.
In my opinion HDRIs are a fast and comfortable way to setup a simple closed room for a test scene with very good chances to get a photo realistic render of glasses and other materials. However, I am more curious about what is required to setup a scene with basic objects, lights and materials. I know this way a rendered image rather looks artificial, at least reasonable based on physics and almost everybody's experiences.
An example scenery
A bulb gives light in an empty apartment with closed shutters. The bulb sits in a cheap plug hanging from the ceiling at the end of two simple wires. A very common scene. Also common are bottles of still and sparkling water together with a few clear plastic glasses for all the hardworking people helping to take one's furniture and other properties from an old to the new address.
Internal Volume
You are right! Internal volume's absorption color is the correct property of choice.
The objects are part of an older scene I've built in the first times of LuxCoreRender.
Meanwhile, I have to question the use of transparency color at all. At the moment I cannot think of any material absorbing parts of polychrome light's spectrum independent on passing through transparent objects path length, see e.g. Beer and Lambert.
Hard Nut to Shell
Looking closer at glassware and liquids design, locations, materials and volumes I had to notice different erroneous things set by younger me.
Liquid in a Container
Although quite easy to make a liquid in a container a special BlendLuxCore or LuxCoreRender feature for creating correct liquid in any container using only two inputs: a) height of liquid level and b) a liquid's internal volume.
Refractive Index
One of those things younger me did correct.
However, I could not resist to illustrate effect of IOR glasses' look.
animated GIF, click to view
Bad Intersection
Depending on volumes' priority hierarchy one can observe rather strange effects if objects intersect unintended.
animated GIF, click to view
Work's Outlook
Still not perfectly happy with the result of my latest renders I nevertheless hope you can see some improvements already.
(Picture missing, troubles to upload it, tried png and jpg with size <1 MB. | Reason: File name was too long.)
- Glassware, Closed Room
Glassware, Closed Room_Additional 4 lights_GPU Path, Light tracing_Bounces T16,S10,G10,S16_Noise Threshold 10, Error mean = 0.115, 4073 Samples_2.02 Mpixels, 44m07s
