hi, Assume there are four layers, all of which are in Normal mode and grayscale. for a specific pixel in each layer, Their intensity and alpha values(mapped to [0,1]) are i1,a1 i2,a2 i3,a3 i4(background) the merged intensity is ((i1*a1+i2*(1-a1))*a2+i3*(1-a2))*a3+i4*(1-a3) am I correct? Thanks!
