I think you’ve confirmed that its not possible to utilise the render queue whilst in play mode.
I’d like to find a way that whilst in play mode, and whilst playing a sequence, that I am able to export that sequence as a JPG sequence. I am using a frame capture plugin to do this at the moment but it only allows avi file capture and is based on opencv screen capture which drops frames consistently and results in jerky playback.
I had hoped this might be possible by firing a console command as described in https://docs.unrealengine.com/en-US/Engine/Sequencer/Workflow/RenderAndExport/RenderingCmdLine/index.html but I have not been able to get this working as it does not recognise the commands even when adjusted in their example. I wonder whether this is fundamental, such as when in play mode, sequence capture via JPG is simply not possible.
In play mode, we take a JSON file dress a model, play a master sequence, wish to record that as a JPG sequence, then load a new JSON file with different parameters, dress the model, record a new JPG sequence and repeat .
Hope that clarifies and thanks again.