input = last
input.tcanny(sigma=1.5,mode=1,t_l=1.5).blur(1).tcanny(sigma=1,mode=1,t_l=2.5)
normalmask = last

normalmask.lsfmod(defaults="slow",edgemode=0).tcanny(sigma=1.5,mode=0)Levels(0, 3.3, 90, 0, 255).blur(0.5)
amplifiedmask = last

normalmask.tcanny(sigma=0.3,mode=1,t_l=1,plane=3).Levels(0, 3.3, 90, 0, 255).removegrain(2).Levels(0, 3.3, 255, 0, 255).daa3
thickmask = last

Overlay(amplifiedmask.Invert(), thickmask, mode="multiply").greyscale


ringingmask = last

mt_merge(input, ringingmask)