Niagara system controlled by audio source (via Blueprint) doesn't appear in MRQ output!

Hi All,

I have encountered a problem whilst trying to render out from the Movie Render Queue.

I have created a blueprint that has a set of Niagara systems within that are controlled by multiple audio sources. See setup below;

Each Niagara system has 4 emitters, one for each audio stem. The idea being that a different set of particles are emitted for each instrument in an audio track.

This works absolutely fine when I play the scene in the editor, however when I go to render it with the movie render queue, the Niagara systems within the BP only seem to work during the engine warm up frames and not during the render stage.

Is there something I’m missing here to get this working? or do Niagara systems within blueprints controlled by audio sources just not work?

I appreciate any help / feedback here.

Thank you kindly!

Regards,

Chris