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How to calculate alpha for n channels, so the sum equals 1 (100% coverage)?

Having "n" number of overlaying channels (bitmaps in the same place, layers etc.) how to calculate required alpha for each of them, so they "hide" background completely? … Each layer can have equal value, sum should be exactly 1 ("full alpha"). "n" is 2 or more (likely up to dozens). …
madneon's user avatar
  • 295
1 vote

How to calculate alpha for n channels, so the sum equals 1 (100% coverage)?

Using "Double Float" for calculations, alpha values in pictures are rounded to 2 decimal places. Black on White: White on Black: …
madneon's user avatar
  • 295