If I have a lot of fixtures, I may want to select 4th fixture, then every 4th+1 fixture. This is useful in instances where you are fanning an array or grid of fixtures and want to create interesting curvy looking beams using pan/tilt, but do not want to apply an effect.
For example, I want to take channels 1>8 & work on them in the order 1,5,2,6,3,7,4,8. I can get to (1,5) (2,6) (3,7) (4,8) using offset, but cannot then remove these parenthesis.
This is useful in instances where you are fanning an array or grid of fixtures and want to create interesting curvy looking beams using pan/tilt, but do not want to apply an effect.
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