import poser
scn = poser.Scene()
fig = scn.CurrentFigure()
mat = fig.Material("6_Eyelash")
tree = mat.ShaderTree()
nods = tree.Nodes()
for nod in nods:
	if nod.Type() == poser.kNodeTypeCodeIMAGEMAP:
		inp = nod.InputByInternalName("Filtering")
		if inp:
			 inp.SetFloat(3)
tree.UpdatePreview()