Dan, thank you so much. I hadn’t anticipated someone literally translating what I’d said and posting it for me. Thats very kind of you.
It works exactly as I hoped, and I can pretty much wrap my head around why, which is just as important.
As soon as I can get the additional render commands working, I’ll be on my way.
Thanks again. Hopefully useful for someone else at some point too.
PS: For the record, in case it’s useful in the future: This was specifically required for the rendering of moving slitscan images, where the relationship between time and position is somewhat changed, meaning that regular keyframes and expressions couldn’t achieve the intended result.