Polygon lighting issue


`````` javascript
[
{
"id": "document",
"name": "TopicID=33",
"version": "1.0"
},
{
"id": "aPolygon",
"polygon": {
"positions": {
"cartographicDegrees": [
0.0, 0.0, 100000.0,
0.0, 10.0, 500000.0,
10.0, 10.0, 100000.0,
10.0, 0.0, 500000.0 ]
},
"perPositionHeight": true
}
},
{
"id": "LowerLeft",
"position": {
"cartographicDegrees": [ 0.0, 0.0, 100000.0 ]
},
"point": {
"color": {
"rgba": [ 30, 144, 255, 255 ]
},
"pixelSize": 10
}
},
{
"id": "UpperLeft",
"position": {
"cartographicDegrees": [ 0.0, 10.0, 500000.0 ]
},
"point": {
"color": {
"rgba": [ 30, 144, 255, 255 ]
},
"pixelSize": 10
}
},
{
"id": "UpperRight",
"position": {
"cartographicDegrees": [ 10.0, 10.0, 100000.0 ]
},
"point": {
"color": {
"rgba": [ 30, 144, 255, 255 ]
},
"pixelSize": 10
}
},
{
"id": "LowerRight",
"position": {
"cartographicDegrees": [ 10.0, 0.0, 500000.0 ]
},
"point": {
"color": {
"rgba": [ 30, 144, 255, 255 ]
},
"pixelSize": 10
}
}
]```
``````

Start by loading the supplied CZML polygon example and reproducing the lighting shown in the attached image. Inspect the polygon rendering and lighting paths to determine why the varying-height polygon is shaded incorrectly; the issue does not state the expected result or name a test, so completion criteria need clarification.

Written by the indexing model from the issue text.