Ah great, thanks for that. Based on this comment I was able to get it working. Quite a performance hit at the moment though (expectedly) so I will look into that now and see if I can find ways to minimise it, eg reduced resolution etc.
Thanks for your guidance @RaananW
Update: I was able to get significant improvement by passing parameters to the second call to render the scene so as to not repeat the animations/physics, ie scene.render(false,true). I have other optimisations to do, such as with ADT, but I am now on track. Thanks again.