Hey ARCHITECT, this is a very cool idea!

What you said about Matmatic being unable to do it is not true. First of all, Matmatic is a way of making nodes. Anything you can make with nodes, you can make with Matmatic nodes. It's just a different way of setting the nodes up.

Matmatic is perfectly capable of using hand-made transmaps as you have used.

However, I found it perhaps even easier to use the ellipse equation in Matmatic so that I could easily tweak the position and fade-in of the transmap.

Here is my version on Jessi. I used a different technique for the fur than you did, but the idea of using the elliptical transmap to drive it is the same as you suggested.

Here is the script:

def FurrySkinbyARCHITECT(clrfile, cx, cy, mx, my, R, scale):
    skincolor = ImageMap(clrfile)
    x = mx * (U - cx)
    y = my *(V - cy)
    r = sqrt(x * x + y * y)
    bf = Clamp(20 * (r - R))
    furcolor = Spots(Color(1, .95, .9), ORANGE * .5, scale, Global_Coordinates = 1)
    color = Blend(skincolor, furcolor, bf)
    s = Surface(color, 1, 1, .2, .5)
    s.Displacement = .3 * Bias(Noise(max = bf), .3)
    return s

bodyfile = ":Runtime:Textures:Poser 6 Textures:Jessi:Jessi_Body.jpg"
headfile = ":Runtime:Textures:Poser 6 Textures:Jessi:Jessi_Face_Color.jpg"

outputs += [
    "Body", FurrySkinbyARCHITECT(bodyfile, .5, .6, 1.3, 1.1, .18, 2),
    "Head", FurrySkinbyARCHITECT(headfile, .5, .4, 1.5, 1.0, .3, 2)
]

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