I just finished watching the NGC1491 Masked Stretch section and have a question. It seems that when you used the "substitute' that you were just using the Masked Script process to stretch one view. Could you have done the same thing using any stretch? since we ended up using 'substitute' as the real action here.
I guess I don't understand what Masked Stretch is used for instead of STF, etc.
Thank you for all the videos.
Jim
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