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Generally Trainz has very specific requirements on the poly count side and texture side. I suspect this tool would be a little like sketchup, fine for static models but not for something that has to be rendered in a sixtyth of a second.
Sorry John
I can see this useful to convert a static model railroad object into a scalable 3d-model, but more difficult for a real outdoor asset due to the number of photos needed to get the right shape.
I came across the notes I had made a few weeks ago on photogrammetry. The webpage I was looking at was:
https://www.imore.com/get-started-photogrammetry-macos
As you can see the process reproduced the plant leaves but not the fine detail of the flowering stalks.
As others have pointed out one needs a lot of pictures. On a Mac there's an app for that. ffmpeg can extract frames from a movie.
https://www.imore.com/how-extract-images-frame-frame-using-ffmpeg-macos
Cayden