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hello I wanted to know how I can achieve an iridescent glass material like the picture I've attached. I've seen a lot of tutorials but only in redshift and octane
I downloaded your file and was able to get pretty close to the same result. A lot of the differences comes down to lighting. I did the following:
- Thin Film IOR: I set the Thin Film IOR to 2.5. Different values will directly change how the rainbow colors appear as reflections - higher values make it look more shiny/chrome like. You had yours set too low.
- Ray Depth: Your "black stuff" was caused by not having enough specular light bounces in your render settings. If you have something shiny and the light is going to bounce around on the inside, you need more specular depth. I set Specular Ray Depth to 5.
- Dispersion: In your Iridescense material, it helps if you add some Dispersion to your Transmission channel. You had none, but I set Dispersion Abbe to 25.
- Caustics: With light passing through a transparent object, it'll look more realistic if you render the caustics. In Advanced tab of your material, check on Caustics and make sure "Internal Reflections" is also checked on.
- Noise Scale: I think your noise was a bit too detailed. I changed the scale from 5 down to 2.
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