function CrappyCombMask(clip inputyv12) {

inputyv12.AssumeFrameBased().Unfilter(0, 100)
blargh = last

YV12Subtract(inputyv12, blargh).Greyscale().Deen("a3d", 4, 10, 0, 30)
wsubtracted = last

Levels(0, 1, 127, 0, 255)
test1 = last

wsubtracted
Invert()
Levels(0, 1, 127, 0, 255)
test2 = last

Overlay(test1, test2, mode="darken")
test3 = last

#inputyv12.SeparateFields().EdgeMask(3, 255, 255, 255, "sobel", Y=3, V=1, U=1).Weave().Blur(0, 1).Greyscale().Levels(0, 1, 35, 0, 255) #.Invert()
#fieldedges = last

inputyv12.MotionMask(thY1=0, thY2=255, y=3,u=1,v=1)
Levels(0, 1, 25, 0, 255, false)
GreyScale()
SeparateFields()
septest3 = last
septest3.SelectOdd()
septest4 = last
septest3.SelectEven()
septest5 = last
Overlay(septest4, septest5, mode="lighten")
TomsMoComp(0, -1, 0)
Binarize() #.Invert()
GreyScale()
motion = last

Overlay(test3, motion, mode="Lighten").Invert().Binarize().Greyscale()
SeparateFields()
septest = last
septest.SelectOdd()
septest1 = last
septest.SelectEven()
septest2 = last
Overlay(septest1, septest2, mode="darken")
TomsMoComp(0, -1, 0).Invert()


}