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Fixed in 2018.3.X



Found in


Issue ID




SetParticles changes the rotation of first few particles when using Quaternion.LookRotation with specific upwards parameter

Visual Effects - Legacy


The upwards parameter has to be Vector3.down or Vector3.right.
Using Vector3.up, Vector3.left, Vector3.forward, Vector3.back does not reproduce the bug.

How to reproduce:
1. Open attached project "" and scene "SampleScene"
2. Enter Play mode
3. Observe Scene or Game view

Expected result: particles do not change their rotation3D
Actual result: first few particles change their rotation3D, resulting in flipped normals

Reproducible with: 2017.1.4p2, 2018.1.7f1, 2018.3.0a3

Workaround: do not use SetParticles with Quaternion.LookRotation upwards parameter

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