I've recently been testing rendering 5000 ellipse entities on the 3d globe. I set each ellipse entity's image that shows a green Arrow that points north.Then I set its strotation value to show where the arrow is pointing.
From observation, almost all ellipses' image appears alright and accurate to its rotation. However, I spotted some with distorted images where the arrow head somehow fuses with another arrow head from opposite direction.
I ventured to a thread- https://groups.google.com/forum/#!topic/cesium-dev/UF9wQugwRf0, that seems to be similar in coding code but it didn't solve the problem i'm having. The only difference in the code is I'm using image URL path, not canvas.
Using Cesium 1.20
Win 7 Pro
Thanks and Regards