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Fixed in 2020.1

Fixed in 2019.2, 2019.3



Found in



Issue ID




[Trail Renderer] Add Key does not add any keys to trail's Width curve



To reproduce:
1. In any project, create an object with Trail Renderer component
2. In Trail Renderer component, find the Width curve interface
3. Try adding keys to the curve by right-clicking and selecting "Add Key"

Expected: key is added to the selected location on the curve
Actual: no key is added

Reproduced in: 2019.1.6f1, 2019.1.11f1, 2019.2.0b10, 2019.3.0a10
Not reproduced in: 2017.4.0f1, 2017.4.30f1 2018.4.4f1, 2019.1.5f1

Note: it seems like trail's width curve has not been updated to a newer curve interface as opposed to the rest of the curves in the editor (such as in particle system)

Comments (18)

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    Jun 27, 2020 12:15

    There is no hard and fast rule to fix this issue. you only need to bypass the double click on curve then Burrrahhh It will automatically fix. Regards

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  9. Df9ad457d176ec9e18f0cb303954eb9b?d=mm


    Jun 24, 2020 12:33

    This issue usually occurs. Don't worry just double-click the curve to look around. New key will be added. by

  10. F54b00211b3f7c2e50ccd27a1afbe501?d=mm


    Jun 23, 2020 09:22

    Double-click the curve to look around. The new key is added successfully. I hope this will work! Regards:

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