Use principled shader

materials.py

@@ -30,27 +30,28 @@ for mat in bpy.data.materials:
         map = nodes.new("ShaderNodeMapping")
         map.location = -400, 0
 
-        # Create diffuse shader
-        diff = nodes.new("ShaderNodeBsdfDiffuse")
-        diff.location = 200, 0
+        # Create principled shader
+        prin = nodes.new("ShaderNodeBsdfPrincipled")
+        prin.location = 200, 0
+        prin.inputs["Specular"].default_value = 0
 
         # Create transparent shader
         trans = nodes.new("ShaderNodeBsdfTransparent")
-        trans.location = 200, -150
+        trans.location = 400, -150
 
         # Create mix shader
         mix = nodes.new("ShaderNodeMixShader")
-        mix.location = 400, 0
+        mix.location = 600, 0
 
         # Create output
         out = nodes.new("ShaderNodeOutputMaterial")
-        out.location = 600, 0
+        out.location = 800, 0
 
         # Link everything
         links.new(coord.outputs[2], map.inputs[0]) # Coord > Map
         links.new(map.outputs[0], tex.inputs[0]) # Map > Texture
-        links.new(tex.outputs[0], diff.inputs[0]) # Texture > Diffuse
-        links.new(diff.outputs[0], mix.inputs[2]) # Diffuse > Mix
+        links.new(tex.outputs[0], prin.inputs[0]) # Texture > Principled
+        links.new(prin.outputs[0], mix.inputs[2]) # Principled > Mix
 
         links.new(trans.outputs[0], mix.inputs[1]) # Transparent > Mix
         links.new(tex.outputs[1], mix.inputs[0]) # Texture alpha > Mix factor