Why is caustics interactive?

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Susan
Posts: 2
Joined: Sun Aug 14, 2022 1:52 am

Why is caustics interactive?

Post by Susan »

Hi. new user of luxcore here.

In brief the caustics path is weakened when the light is cast onto another surface. I wonder if there is a way to show off the caustics path and show the caustics on a surface at the same time.

Thanks in advance.
Attachments
Light path is weakened with a caustics receiver
Light path is weakened with a caustics receiver
Light path looks great without a caustics receiver
Light path looks great without a caustics receiver
Something of a desired final result, image stolen from indigo
Something of a desired final result, image stolen from indigo
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Sharlybg
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Re: Why is caustics interactive?

Post by Sharlybg »

Hi Susan welcome to the Lux community.

Here is an example file replicating your scene and wishes.
Susan.jpg
Caustic_receiver.blend
(959.26 KiB) Downloaded 237 times
1__ Do it with bidir it will show path that are missed in PATHTracer+LightTracer.
2__ Create 2 volume one with air settings attached to your camera a second with homogenous fog attached to your spot light exterior volume
3__ Just added 2 area light to see the suzane head better.
4__ You can make the suzane head brighter by replacing the internal ""Clear volume"" by a ""Homogenous volume""
Like this:
node.jpg
Susan2.jpg
And a video Tutorial I should have made since a while about the subject :
https://youtu.be/GyuUYGJAv9s
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Susan
Posts: 2
Joined: Sun Aug 14, 2022 1:52 am

Re: Why is caustics interactive?

Post by Susan »

Whoa thanks a lot!
I never knew there is a fog render environment counter part, that way too cool.
And nice video there, very underrated, thank you for making these!
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