I hope to get the effect of P1, but in fact he can only get the effect of the black box of P2by code

``````    var entity2 = viewer.entities.add({
polygon: {
hierarchy: new Cesium.PolygonHierarchy(positions),
material: new Cesium.ImageMaterialProperty({
image: "path to png",
transparent: true
})
}
});
``````

Set texture coordinates for the polygon, see: Sandcastle - Polygon, ref-doc - textureCoordinates

`````` textureCoordinates: {
positions: [
new Cesium.Cartesian2(0, 1),
new Cesium.Cartesian2(0, 0),
new Cesium.Cartesian2(0.5, 0),
new Cesium.Cartesian2(1, 0),
new Cesium.Cartesian2(1, 1),
]
}
``````

Each coordinate point in `polygon.hierarchy` corresponds (in order) to the texture coordinate, which is a two-dimensional spatial coordinate system (as shown below) with u and v in the range `0` to `1`, here is an example that I hope will help you. sandcastle

Other shapes: sandcastle

Thanks again for your answer, I now have a new problem, my pictures are flipped up and down in some places. do you know how to solve it.

``````    var positions = Cesium.Cartesian3.fromDegreesArray([
Number(126.961519),
Number(46.207604),
Number(127.865895),
Number(46.031461),
Number(127.617953),
Number(45.424603)
Number(126.722977),
Number(45.599256)
]);

polygon: {
hierarchy: new Cesium.PolygonHierarchy(positions),
perPositionHeight: true,
material: new Cesium.ImageMaterialProperty({
image: "./test.jpg"
}),

}
});
``````

Rearrange the order of coordinate points in `positions`.

I don’t think it’s an issue with the order of the points,If I use perPositionHeight: false,it’s direction will be right，but it will be incompletely displayed

Textured polygons are not recommended for displaying geolocated imagery due to the precision needed.

Does `SingleTileImageryProvider` work for your use case?

I guess not, it only supports rectangular range

@Gabby_Getz OH! I found that this problem had appeared on github many years ago Fit texture coordinates to rectangle/trapezoid geometry · Issue #4164 · CesiumGS/cesium · GitHub
Is he making any progress now?