[Lazpaint][Solved]How to make "Colour to alpha"?

[devEric69]

(for memory, it can be useful to others)

In Lazpaint, emulate a menu "Colour" > "to alpha" (here, white colour towards transparent) can be done with the menu "Filter" > "Apply function...":

Code: Text  [Select][+][-]

1. alpha(0..1) = if(red>0.5 and green>0.5 and blue>0.5,0,1)