AFAIK, the 'Field' parameter lets you set size from 0 to 12. That's about as precise as it get, I guess. But you can at least give them those values, so the DI house may figure out how any of those numbers translate into their scalers.
I don't think there's a technical difference, and I'm fairly sure there's nothing 3D about it.
My educated guess is that the Blow-Up effect is a film-style MC effect (from the early nineties), and I think that the 'field' and X/Y parameters would show up in a traditional film cut list. Perhaps the 'Field' entry actually has a true bearing on optical bank settings, but I'm not sure.
The effect doesn't seem that relevant in the current era of DI post, and it's probably being kept around for compatibility reasons. It might very well be older than Resize, it might also have been part of different software packages back in its day.
Why the editor used this effect, I have no clue. May just have been what he was used to.
J, NL
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