Some particles behave differently in the 1.16 release candidates.

Partner Rank: 3

Partner Team Reporting:

Gamemode One

Verification builds:

Verification builds: Minecraft.Windows_1.16.57.0_x64_UAP.Release_Test

Summary:
Some particles behave differently in the 1.16 release candidates, they are billboarding to face the player rather than having a fixed direction.

Impact:
This bug vastly lowers the effectiveness of many particles used in maps on the marketplace by causing flickering and inconsistent visibility.

Repro Steps:
1. Create an Advanced Mining world from the marketplace template.
2. Play through the first few minutes of the map.
3. When you are asked to follow Clyde, observe his blue particle form.

Observed Results:
The particle flickers and is not visible when looked at from another axis. This is shown in the video linked below.

Expected Results:
The particle should appear as it did in the regression build. There is only occasional flickering and it can be viewed from all sides.

Screenshots/Videos attached:

Yes. The video is timestamped at 1:50
https://youtu.be/tbx4nPT3jkM?t=107

Regression Builds:
Publish 1.14.60.5_rc8