Well folks, not only have I thought, I have also acted, and have some images for your consideration. First though a bit of theory. You all know by now that I like things to be "right", and that I can get considerably irked if they aren't. The paradox though is that PN isn't "right" in many respects. I don't need to beat myself up over that, as I long ago realised that if I wanted it to be right in every respect, I couldn't do it. What I have gives me many hours of pleasure, and will continue to do so. That surely should be the ultimate objective.
However, and there always is one with me, I still have that instinct when dealing with an individual aspect to try to get it right, which means as close as possible to the real thing. Applying that to the corner behind Crescent Bridge, I immediately have to face the fact that it isn't right at all, as there is a far sharper curve than ever was in reality. Do I then go for what may look right, even though in prototypical terms it is wrong? If I do that, I can very easily get this.
Visually, that immediately solves a lot of problems, but of course it isn't right, as there wasn't another track behind the Down slow in reality. However, if the GN tracks had curved as mine do, might not the Midland tracks have done the same? Then it would arguably be right for PN in my world, though wrong in the real one. I can of course achieve this result by always having something on the Down slow when taking this shot, but there wouldn't have been, so that bugs me.
Now to the other possibility. Nene sidings can be seen on prototype images. Surprising in a way, for, as Steve says, they are at a lower level, but if it is to be right in the real world, they should be there. So, can I improve on my earlier effort? I felt that a major problem was the track in front of the sidings which didn't match up at all with the rest of the layout, so I revisited the image I had used, and cropped it more closely. Here is the result.
Despite the gloom outside, any more exposure than this rendered the backscene invisible, so this is what we have. I think that is a big improvement and my brain tells me it is more near to reality. It would need some more tweaking, but nothing that can't be done.
So there we go. The choice seems to be between "wrong but looks right", or "more nearly right, but still wrong". Why is the last image still wrong? The over sharp curve, of course, but also the fact that the backscene isn't PN at all - it's the North end of Doncaster works sidings. You may remember though my attempts at reproducing a prototype image, which didn't work, as the sidings were very much out of focus.
Over to you folks.