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This sample shows how to set pattern fills on polygons. When rendering multiple overlapping polygons representing different types of areas using only color to encode the information, it can become difficult to distinguish between the areas. In urban planning for example, there are areas representing different zones and other overlapping areas representing parcels.

In this example we are using a polygon pattern fill to render the urban renewal area overlay for an urban development plan.

The pattern style is set on the FillSymbol3DLayer on a PolygonSymbol3D:

const symbol = {
  type: "polygon-3d",
  symbolLayers: [{
    type: "fill",
    material: { color: "red" },
    outline: { color: "red" },
    pattern: {
      type: "style",
      style: "cross"

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