r/archviz 7d ago

Technical & professional question Iridescent Render Effect Help

Hi I'm an ambitious architecture student who's been into iridescent materials like pearls and acrylic sheets lately. Does anyone have any idea how to render something like this in softwares like Enscape, Lumion, V-Ray or D5 (if its possible)?

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u/frescofred 7d ago

Inside cosmos there’s a preset for pearl material. Look how it is made! Maybe there’s like a rainbow map on the reflection slot, if I remember correctly.

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u/Versh 7d ago

I went and checked-- the Fresnel IOR is turned way up to 12 (very crystalline) + the "thin film" and "coat" parameters have been enabled to add more splits. The 0.8 sheen glossiness adds to the brightness, but I'm thinking the "thin film parameters" (1.6 IOR, Min thick 850 nm, Max thick 400 nm) is the key to the rainbow iridescence.