LuxCoreRender Forums

Study of modeling and photo-realistic rendering of glasses and liquids.

N8ce render models and beautifull caustics. Could be improved with higher specular deph value to clear the dark reflection in glass. But it will be very demanding (specular between 48 to 128 ) plus higher clamping to keep details.
If you want to test try with half the resolution (will speed up render 4X) and you enlarge with online AI tools like lets enhance for free.

you did a good job here, i like the render and feel of the images, well done.

Hello friends thanks for the compliments. I tested with 128 Sharlybg, I found the image a little washed, I liked the black areas because of the contrast, the clamping took too much shine ... I never really understood how the clamping works. Could you explain me?

Looks great

JulianoLisboa wrote: Tue Mar 09, 2021 1:08 pm the clamping took too much shine ... I never really understood how the clamping works. Could you explain me?

It looks like your clamping value is too low here.
Clamping means roughly that samples that are brighter than the clamping value are made darker.

JulianoLisboa wrote: Tue Mar 09, 2021 1:08 pm Hello friends thanks for the compliments. I tested with 128 Sharlybg, I found the image a little washed, I liked the black areas because of the contrast, the clamping took too much shine ... I never really understood how the clamping works. Could you explain me?

whisky02.png

Clamping means anything above and the number will be set (clamp) to a maximum number.
In math means if you have something like 1.2 and the maximum number for the clamp is 1 any bigger number that will change to 1.
so in your case too bright areas have a bigger number than the maximum threshold so they will be less bright to respect the threshold in the clamp.
Think of level in photoshop that just filter the bright pixels and make them darker to reach the certain value.

For contrast level and final touch good reference help a lot :
you can see clamping as a tool to cut every bright pixels above a given value (the one you set).

Higher value == brighter image and more details in highlight (but noisier)
Lower value == darker les contrasted image (softer and clean output )

So you have to find a balance depending on your project.

What do you think? I used the clamp value of 20, I found the suggested value of 1.47 to be very low.

It is already perfect, of course personally I prefer a little bit more of caustics.