Use for material's absorption color

Use this forum for general user support and related questions.
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Post Reply
User avatar
MetinSeven
Posts: 137
Joined: Sun Aug 18, 2019 10:19 am
Location: Netherlands
Contact:

Use for material's absorption color

Post by MetinSeven »

Hi,

What's the common use of a LuxCoreRender material's Absorption functions? It seems that it only changes the surface color, or can you also achieve some SSS effect with it, as opposed to adding a Volume node?

Thanks!
visualizer • illustrator • animator • 3D designer — metinseven.nl
User avatar
B.Y.O.B.
Developer
Developer
Posts: 4146
Joined: Mon Dec 04, 2017 10:08 pm
Location: Germany
Contact:

Re: Use for material's absorption color

Post by B.Y.O.B. »

It simulates absorption in the glossy coating, which means it's angle-dependent: the shallower the angle between camera and surface, the stronger the effect. I think I've seen this effect in pottery glaze, but I'm not totally sure. It can also be used for car paint.

It does not compute any SSS.
Attachments
Capture.PNG
User avatar
MetinSeven
Posts: 137
Joined: Sun Aug 18, 2019 10:19 am
Location: Netherlands
Contact:

Re: Use for material's absorption color

Post by MetinSeven »

Thanks for the clarification! So if I understand it correctly absorption on a material level is more like a coating, not sub-surface absorption for a SSS / translucency effect. A volume node is needed for that.
visualizer • illustrator • animator • 3D designer — metinseven.nl
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: Use for material's absorption color

Post by Dade »

MetinSeven wrote: Mon Jul 27, 2020 10:00 am Thanks for the clarification! So if I understand it correctly absorption on a material level is more like a coating, not sub-surface absorption for a SSS / translucency effect. A volume node is needed for that.
Yes, in Lux, materials always describe only the surface, the inside of an object is defined by the volume definition.
Support LuxCoreRender project with salts and bounties
User avatar
MetinSeven
Posts: 137
Joined: Sun Aug 18, 2019 10:19 am
Location: Netherlands
Contact:

Re: Use for material's absorption color

Post by MetinSeven »

Thanks! 👍
visualizer • illustrator • animator • 3D designer — metinseven.nl
Post Reply