Screenshot from glTF Sample Viewer with the environment Wide Street and the ACES (Hill) tonemapper.
This asset demonstrates the use of KHR_materials_specular and KHR_materials_sheen to represent shot-silk fabric on a pouf pillow.
The material is based on photo reference of real silk fabric, an Italian 15th century gown in shot silk.
The fabric creates an iridescent-like effect by weaving two or more colors in opposing directions with warp and weft silk yarns.
Photograph of the real fabric. Credit: (c) Eva Andersson
The asset was created using 3ds Max, exported to glTF using the Real-Time Exporter, and materials were edited in Visual Studio Code with glTF Tools.