The Iridescence Map controls where and how much an object’s surface exhibits colorful light interference; similar to soap bubbles, beetle shells, or oil slicks. Iridescence simulates how light reflects at varying wavelengths depending on the viewer angle and surface curvature, giving materials a shimmering, color-shifting quality.
The Iridescence Map is a grayscale texture: white (1) applies full iridescence, black (0) turns it off. Use it to localize the effect on edges, surface details, or select design zones, rather than applying it uniformly across the mesh.
Wrap S / Wrap T – define what happens when UVs go beyond 0-1 in the horizontal (S) or vertical (T) direction. Repeat tiles the image, Clamp stretches the edge pixels, and Mirrored tiles while flipping every other tile for a checker-seam look.
Flip Y – inverts the texture vertically; turn it on if your image appears upside-down due to differing UV origins.
Anisotropy – boosts texture sharpness at glancing angles; higher numbers keep details crisp on surfaces seen from the side.
thicknessMin – sets the minimum film thickness used for interference calculations – lower values shift the base color spectrum toward warmer tones.
thicknessMax – sets the maximum film thickness: higher values expand the range of visible interference and intensify color shift.
Rotation – spins the entire UV space (in radians), letting you align stripes or grain precisely.
offset X / offset Y – shift the starting point of the texture; handy for sliding patterns or matching seams.
repeat X / repeat Y – control how many times the image tiles across each axis: use integers for even tiling or fractions for stretch effects.
center X / center Y – set the pivot for rotation and scaling; (0.5, 0.5) rotates around the texture’s true center, while (0, 0) pivots around the lower-left corner.
For advanced control, this map is connected with the iridescence and Iridescence IOR (Index Of Reflection) sliders in the MaterialSettings of the frontend Canvas UI. It’s especially powerful in fashion, stylized design, or fantasy scenes where visual complexity and movement-reactive color are important.
Supported materials
Physical Material