1. A concise explanation of the problem you’re experiencing.
Colors appear to be very different for the same geometry in 3D and 2D
2. A minimal code example. If you’ve found a bug, this helps us reproduce and repair it.
var color = null;
var feature = null;
var geometry = null;
var polygon = null;
var scene = null;
var viewer = null;
viewer = new Cesium.Viewer(‘cesiumContainer’);
scene = viewer.scene;
color = Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.WHITE);
polygon = new Cesium.PolygonGeometry.fromPositions({
perPositionHeight: true,
positions: Cesium.Cartesian3.fromDegreesArrayHeights([
-94.0, 37.0, 50000,
-87.0, 37.0, 10000,
-87.0, 32.0, 15000,
-94.0, 32.0, 10000
]),
vertexFormat: Cesium.PerInstanceColorAppearance.VERTEX_FORMAT
});
geometry = new Cesium.GeometryInstance({
attributes: {
color: color
},
geometry:polygon
});
feature = new Cesium.Primitive({
geometryInstances: geometry,
appearance: new Cesium.PerInstanceColorAppearance()
});
scene.primitives.add(feature);
3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
While in 2D polygon items are not as noticeable as the are in 3D
4. The Cesium version you’re using, your operating system and browser.
O.S. Windows 7, Browser: Chrome 66.0.3359.181
Attached are screen shots showing the different Scene Modes
