What is iridescent map?

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1

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Hello everyone I have looked in the three.js editor and found that we can upload an iridescent map can anyone help me, understand how an iridescent map looks and works?

2

Ever seen soap bubbles in daylight?

  1. iridescentMap works only with MeshPhysicalMaterial (the quite super-expensive PBR material version of MeshStandardMaterial)
  2. The texture itself is just a black-and-white texture defining the amount of light shift happening on the surface of the object (docs). Just keep in mind that this effect may either not work at all or not look pretty at all on cubes - you’d need something with softer edges / smoother normals to get a good results.