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Fixed in Unity 2017.3.0f3



Found in


Issue ID




Particle UI stuttering when navigating up and down since enabling particle collision: Plane




Priority: 4Not yet prioritized for a release


Severity: 4Minor or cosmetic issue

Repro steps (original attached project):
1. Drag "MissilesCollision" prefab into the scene.
2. Make sure the Particle Editor is open
3. In the Particle Editor, expand the Collisions module and change the type to Planes

I've also attached a smaller project, Bug_01.rar. If you want to use this, the repro steps are:
1. Open Scene 1
2. Select the Particle System prefab instance in the scene, and open the Editor.
3. Change the Collisions module's type to Planes.

Observe error / UI messes up like in the screenshot above.

The following errors appear in the console:

NullReferenceException: Object reference not set to an instance of an object
UnityEditorInternal.EditMode.DoInspectorToolbar (.SceneViewEditMode[] modes, UnityEngine.GUIContent[] guiContents, Bounds bounds, UnityEditor.Editor caller) (at C:/buildslave/unity/build/Editor/Mono/Inspector/EditMode.cs:190)
UnityEditor.ModuleUI.GUIButtonGroup (.SceneViewEditMode[] modes, UnityEngine.GUIContent[] guiContents, Bounds bounds, UnityEditor.Editor caller) (at C:/buildslave/unity/build/Editor/Mono/ParticleSystemEditor/ParticleSystemModules/ModuleUIHelpers.cs:159)
UnityEditor.CollisionModuleUI.OnInspectorGUI (UnityEditor.InitialModuleUI initial) (at C:/buildslave/unity/build/Editor/Mono/ParticleSystemEditor/ParticleSystemModules/CollisionModuleUI.cs:230)
UnityEditor.ParticleSystemUI.OnGUI (Single width, Boolean fixedWidth) (at C:/buildslave/unity/build/Editor/Mono/ParticleSystemEditor/ParticleSystemUI.cs:190)

- Not a regression, happens in 2017.1 and 2017.2

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