The only thing I can see that remotely relates back to the camera, and there being a difference is the Level Sequences in the Content Drawer.
The original sequence shows the scene but the other two don’t - I can’t see how this would make any difference but was hoping it might lead to something else insignificant which could be the answer.
Edit: I’ve just duplicated the Box1_Zoom and changed the camera end position in the sequence to match that of the Box2_Zoom, then altered the relevant blueprints.
This created a sequence that does have an image, and where the camera stays in place at the end of playing the sequence. So I must have done something wrong with these two sequences when I created them, not sure what but at least it’s solved now.
On to those splines…
I’ve found tutorials about creating your own spline models, and tutorials about moving/animating objects along splines.
But what I want to do is animate the creation of splines (I think). So when you click the relevant button lines are drawn from the object to ‘connected’ objects.
Or would it be better/easier if the lines already exist and clicking the button makes them change colour or glow?