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Fixed in 5.5.2

Votes

2

Found in

5.5.0f3

Issue ID

856842

Regression

Yes

Particle emission by distance does not interpolate

Shuriken

-

Repro steps

1. Create a new Unity project and import the attached prefab.
2. Press play
3. Observe how the last system (emission by distance more frequent (red saturated)) does not interpolate the particle position.

Expected outcome:
The particle position to interpolate, creating a long red line of particles.

Notes:
- Regression, most likely introduced when combined time/distance emission was added.
- Setting the fixed timestep to 0.0001 resolves the issue in the editor, but it is still present in play mode.

Comments (4)

  1. 7ecf0b74616ba7171aa2c3098d8867c3?d=mm

    DearUnityPleaseAddSerializableDictionaries

    Nov 06, 2021 19:40

    I have filed another bug to track the fix for both sides: https://fogbugz.unity3d.com/default.asp?1378785_bvanmlfq6msap2j3&_ga=2.215394135.1106301989.1635889309-719161878.1627978879

    The solution is to introduce a checkbox/option, since there are two conflicting/contradicting bug reports that cancel each other out.

  2. 7ecf0b74616ba7171aa2c3098d8867c3?d=mm

    DearUnityPleaseAddSerializableDictionaries

    Nov 06, 2021 18:49

    Actually I need this to be in worldspace, can this bug be re-opened and we should track this because this bug being fixed has caused issues for other people

  3. 7ecf0b74616ba7171aa2c3098d8867c3?d=mm

    DearUnityPleaseAddSerializableDictionaries

    Nov 06, 2021 18:38

    Nevermind, I guess we can use the workaround of using local space to stop this interpolation, and only try move the particles globally.

  4. 7ecf0b74616ba7171aa2c3098d8867c3?d=mm

    DearUnityPleaseAddSerializableDictionaries

    Nov 06, 2021 18:26

    There are arguments whether this should happen or not. Please can there be documentation/guidance on how to enable or disable this depending on our usecase.

    Depending on the use-case, several users have complained: https://forum.unity.com/threads/moving-a-particlesystem-why-does-unity-interpolate-its-position.134283/

    "Fixing" this bug was a "bug" for these users.

    See this bug, which is an inverse of the reported bug: https://fogbugz.unity3d.com/default.asp?765777_i0h34elif7r4q7fd&_ga=2.43999973.1106301989.1635889309-719161878.1627978879

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