Caustics for metal material

[david_david1]

Vray7: pls help, no idea how to create water caustics for stainless steel pool...(it is working for other materials, but as for the metal, it shows nothing...) thnx

[natalia.gruzdova]

Hello david_david1, welcome to Chaos Forums!

Could you please share your project to take a look at your actual setup? Please make an archive using the Pack Project tool and either attach it here on forum or open a ticket (request type: Product usage questions or issues) where you submit your files.

[david_david1]

Hello,

please see enclosed file - as you can see caustics is working with "normal" generic material (just a color and some reflection)

unfortunately the file was too big for upload with the metal material - but it is from Chaos Cosmos library "Metal Brushed Linear 40cm" - if you use this material, the water caustic disappears...

What am I doing wrong?

thank you

[natalia.gruzdova]

Thank you for your file David,

As far as I can see any material that has Metalness of 1 does not produce caustics similarly to material with Metalness of 0. I will need more time to test and research, in the meantime I can suggest creating Metal material from Generic material with approximately such settings:

• Reflection Glossiness ~ 0.9;
• Metalness = 0;
• Fresnel - on;
• Reflection IOR = 10;
• Surface Control - Use Glossiness.

Also to make Caustics more pronounced considering that this is reflective material you can change Caustics Multiplier to some higher value (e.g.5)
Here is a screenshot: