mix group needed a factor

Was defaulting to 1 and only using the top half of the stack

i_scene_cp77_gltf/material_types/multilayered.py

@@ -242,6 +242,8 @@ def createLayerMaterial(self,LayerName,LayerCount,CurMat,mlmaskpath,normalimgpat
             CurMat.links.new(CurMat.nodes[LastLayer].outputs[1],MixLayerStacks.inputs[5])
             CurMat.links.new(CurMat.nodes[LastLayer].outputs[2],MixLayerStacks.inputs[6])
             CurMat.links.new(CurMat.nodes[LastLayer].outputs[3],MixLayerStacks.inputs[7])
+            factor=CreateShaderNodeValue(CurMat, 0.5, -1100,-250, "Factor")
+            CurMat.links.new(factor.outputs[0],MixLayerStacks.inputs[8])
 
             # replace the connections from the bottom of the stack with these
             CurMat.links.new(MixLayerStacks.outputs[0],CurMat.nodes['Principled BSDF'].inputs['Base Color'])
@@ -657,4 +659,4 @@ def create(self,Data,Mat):
         else:
             LayerNormal=Data["GlobalNormal"]
 
-        self.createLayerMaterial(os.path.basename(Data["MultilayerSetup"])[:-8]+"_Layer_",LayerCount,CurMat,Data["MultilayerMask"],Data["GlobalNormal"])
+        self.createLayerMaterial(os.path.basename(Data["MultilayerSetup"])[:-8]+"_Layer_",LayerCount,CurMat,Data["MultilayerMask"],Data["GlobalNormal"])