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Set Material on particle system doesn't work anymore

I have a blueprint that randomly selects a material and assigns it to a particle system in order to create color variations:

alt text

This was working fine on 4.17, but once I updated my project to 4.19, the particles always have their default material. I debugged and made sure that a valid random material is getting chosen, that the random materials render as expected when I preview them, and that this code is actually running.

Workarounds I've tried:

  • Toggling visibility of the particle system off/on after calling Set Material to see if that would force an update.

  • Using a particle component instead of Spawn Emitter at Location, and calling Set Material on it before activating the particle system.

  • Adding a delay between spawning the emitter and calling Set Material

None of those worked, so I'm at a bit of a loss how to get around this without pursuing a different implementation. Help would be appreciated!

Product Version: UE 4.19
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asked Mar 29 '18 at 08:39 PM in Bug Reports

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avatar image Jeff A ♦♦ STAFF Mar 29 '18 at 08:59 PM


We've recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.



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