Rendering Polylines with Arrows and clamped to ground? Choppy arrow heads are occurring.

Hello,

We are trying to implement polylines with arrows that can clamp to ground, but I'm seeing some issues where the end of the arrow becomes fuzzy when when it is clamped to ground. Saw that on Cesium 1.47 support for polylines clamped to ground was added: https://cesium.com/blog/2018/07/23/polylines-on-terrain/

I produced a sandcastle example here: https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/#c=nVLLTsMwEPwVK5cGKXV4FCFBWoEKgkMREa8L4eA2S2vheKO1kypF/XecR0UoN/aUHc/Mjr0pBbFSwhqIjZmGNZuCkUXGXxvMHyyadoraCqmBBgcXiU506VR5QbmCKyJcO2nrwUFbaSUYLtLU/0o0c6VFBuycDeJGwIwlIZcry0QjFZatoO4HQUvPUVXKzXKSzqBFjTNGbRzcRZwKsu5L6BP+QZhdw5IAjAskqrvG0fhvw7PTgI1OAnZ6WFfwY/jPGh4d/3J8P+h5rmVqVy7gqD8oExZICuXw3vvG3S2b97vvKDFhDmQrf3dDVEg8fnmMZzf9OQslsvwZbwkLnZ4zSwW0h9tEb7sNtfvYIGbP6O9tp6Z4gRcZWymYtNJLmeVIlhWkfM5DC1muXCwTzovFJ1i+MI0sCneiKJUlk+k48fb+kcSrAxrjTj4KpZ7kBhJvEoWO/0umUKRSLx9KICWqmrI6msxakHMeha79q7KIai6o5/gN

I'm just wondering is this the correct way to make a polyline arrow clamp to ground or is there a more proper way?

OS: Windows 10 and browser Chrome

Any help would be appreciated thanks!

Thanks for opening the GitHub issue!

https://github.com/AnalyticalGraphicsInc/cesium/issues/7645

Looks like it is indeed a bug.