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Yusarina
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# -*- coding: utf-8 -*-
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# Copyright 2014 MMD Tools authors
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# This file was originally part of the MMD Tools add-on for Blender
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# You can find MMD Tools here: https://github.com/MMD-Blender/blender_mmd_tools
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# Neoneko has modified this file to work with Avatar Toolkit and may of made changes or improvements.
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# MMD Tools is licensed under the terms of the GNU General Public License version 3 (GPLv3) same as Avatar Toolkit.
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from typing import Iterable, Optional
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import bpy
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from .core.shader import _NodeGroupUtils
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from .core.material import FnMaterial
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def __switchToCyclesRenderEngine():
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if bpy.context.scene.render.engine != "CYCLES":
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bpy.context.scene.render.engine = "CYCLES"
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def __exposeNodeTreeInput(in_socket, name, default_value, node_input, shader):
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_NodeGroupUtils(shader).new_input_socket(name, in_socket, default_value)
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def __exposeNodeTreeOutput(out_socket, name, node_output, shader):
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_NodeGroupUtils(shader).new_output_socket(name, out_socket)
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def __getMaterialOutput(nodes, bl_idname):
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o = next((n for n in nodes if n.bl_idname == bl_idname and n.is_active_output), None) or nodes.new(bl_idname)
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o.is_active_output = True
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return o
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def create_MMDAlphaShader():
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__switchToCyclesRenderEngine()
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if "MMDAlphaShader" in bpy.data.node_groups:
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return bpy.data.node_groups["MMDAlphaShader"]
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shader = bpy.data.node_groups.new(name="MMDAlphaShader", type="ShaderNodeTree")
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node_input = shader.nodes.new("NodeGroupInput")
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node_output = shader.nodes.new("NodeGroupOutput")
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node_output.location.x += 250
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node_input.location.x -= 500
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trans = shader.nodes.new("ShaderNodeBsdfTransparent")
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trans.location.x -= 250
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trans.location.y += 150
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mix = shader.nodes.new("ShaderNodeMixShader")
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shader.links.new(mix.inputs[1], trans.outputs["BSDF"])
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__exposeNodeTreeInput(mix.inputs[2], "Shader", None, node_input, shader)
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__exposeNodeTreeInput(mix.inputs["Fac"], "Alpha", 1.0, node_input, shader)
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__exposeNodeTreeOutput(mix.outputs["Shader"], "Shader", node_output, shader)
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return shader
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def create_MMDBasicShader():
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__switchToCyclesRenderEngine()
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if "MMDBasicShader" in bpy.data.node_groups:
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return bpy.data.node_groups["MMDBasicShader"]
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shader: bpy.types.ShaderNodeTree = bpy.data.node_groups.new(name="MMDBasicShader", type="ShaderNodeTree")
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node_input: bpy.types.NodeGroupInput = shader.nodes.new("NodeGroupInput")
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node_output: bpy.types.NodeGroupOutput = shader.nodes.new("NodeGroupOutput")
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node_output.location.x += 250
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node_input.location.x -= 500
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dif: bpy.types.ShaderNodeBsdfDiffuse = shader.nodes.new("ShaderNodeBsdfDiffuse")
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dif.location.x -= 250
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dif.location.y += 150
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glo: bpy.types.ShaderNodeBsdfAnisotropic = shader.nodes.new("ShaderNodeBsdfAnisotropic")
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glo.location.x -= 250
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glo.location.y -= 150
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mix: bpy.types.ShaderNodeMixShader = shader.nodes.new("ShaderNodeMixShader")
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shader.links.new(mix.inputs[1], dif.outputs["BSDF"])
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shader.links.new(mix.inputs[2], glo.outputs["BSDF"])
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__exposeNodeTreeInput(dif.inputs["Color"], "diffuse", [1.0, 1.0, 1.0, 1.0], node_input, shader)
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__exposeNodeTreeInput(glo.inputs["Color"], "glossy", [1.0, 1.0, 1.0, 1.0], node_input, shader)
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__exposeNodeTreeInput(glo.inputs["Roughness"], "glossy_rough", 0.0, node_input, shader)
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__exposeNodeTreeInput(mix.inputs["Fac"], "reflection", 0.02, node_input, shader)
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__exposeNodeTreeOutput(mix.outputs["Shader"], "shader", node_output, shader)
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return shader
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def __enum_linked_nodes(node: bpy.types.Node) -> Iterable[bpy.types.Node]:
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yield node
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if node.parent:
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yield node.parent
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for n in set(l.from_node for i in node.inputs for l in i.links):
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yield from __enum_linked_nodes(n)
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def __cleanNodeTree(material: bpy.types.Material):
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nodes = material.node_tree.nodes
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node_names = set(n.name for n in nodes)
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for o in (n for n in nodes if n.bl_idname in {"ShaderNodeOutput", "ShaderNodeOutputMaterial"}):
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if any(i.is_linked for i in o.inputs):
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node_names -= set(linked.name for linked in __enum_linked_nodes(o))
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for name in node_names:
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nodes.remove(nodes[name])
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def convertToCyclesShader(obj: bpy.types.Object, use_principled=False, clean_nodes=False, subsurface=0.001):
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__switchToCyclesRenderEngine()
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convertToBlenderShader(obj, use_principled, clean_nodes, subsurface)
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def convertToBlenderShader(obj: bpy.types.Object, use_principled=False, clean_nodes=False, subsurface=0.001):
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for i in obj.material_slots:
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if not i.material:
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continue
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if not i.material.use_nodes:
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i.material.use_nodes = True
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__convertToMMDBasicShader(i.material)
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if use_principled:
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__convertToPrincipledBsdf(i.material, subsurface)
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if clean_nodes:
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__cleanNodeTree(i.material)
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def convertToMMDShader(obj):
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"""BSDF -> MMDShaderDev conversion."""
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for i in obj.material_slots:
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if not i.material:
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continue
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if not i.material.use_nodes:
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i.material.use_nodes = True
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FnMaterial.convert_to_mmd_material(i.material)
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def __convertToMMDBasicShader(material: bpy.types.Material):
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# TODO: test me
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mmd_basic_shader_grp = create_MMDBasicShader()
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mmd_alpha_shader_grp = create_MMDAlphaShader()
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if not any(filter(lambda x: isinstance(x, bpy.types.ShaderNodeGroup) and x.node_tree.name in {"MMDBasicShader", "MMDAlphaShader"}, material.node_tree.nodes)):
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# Add nodes for Cycles Render
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shader: bpy.types.ShaderNodeGroup = material.node_tree.nodes.new("ShaderNodeGroup")
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shader.node_tree = mmd_basic_shader_grp
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shader.inputs[0].default_value[:3] = material.diffuse_color[:3]
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shader.inputs[1].default_value[:3] = material.specular_color[:3]
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shader.inputs["glossy_rough"].default_value = 1.0 / getattr(material, "specular_hardness", 50)
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outplug = shader.outputs[0]
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location = shader.location.copy()
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location.x -= 1000
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alpha_value = 1.0
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if len(material.diffuse_color) > 3:
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alpha_value = material.diffuse_color[3]
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if alpha_value < 1.0:
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alpha_shader: bpy.types.ShaderNodeGroup = material.node_tree.nodes.new("ShaderNodeGroup")
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alpha_shader.location.x = shader.location.x + 250
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alpha_shader.location.y = shader.location.y - 150
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alpha_shader.node_tree = mmd_alpha_shader_grp
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alpha_shader.inputs[1].default_value = alpha_value
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material.node_tree.links.new(alpha_shader.inputs[0], outplug)
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outplug = alpha_shader.outputs[0]
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material_output: bpy.types.ShaderNodeOutputMaterial = __getMaterialOutput(material.node_tree.nodes, "ShaderNodeOutputMaterial")
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material.node_tree.links.new(material_output.inputs["Surface"], outplug)
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material_output.location.x = shader.location.x + 500
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material_output.location.y = shader.location.y - 150
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def __convertToPrincipledBsdf(material: bpy.types.Material, subsurface: float):
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node_names = set()
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for s in (n for n in material.node_tree.nodes if isinstance(n, bpy.types.ShaderNodeGroup)):
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if s.node_tree.name == "MMDBasicShader":
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l: bpy.types.NodeLink
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for l in s.outputs[0].links:
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to_node = l.to_node
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# assuming there is no bpy.types.NodeReroute between MMDBasicShader and MMDAlphaShader
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if isinstance(to_node, bpy.types.ShaderNodeGroup) and to_node.node_tree.name == "MMDAlphaShader":
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__switchToPrincipledBsdf(material.node_tree, s, subsurface, node_alpha=to_node)
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node_names.add(to_node.name)
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else:
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__switchToPrincipledBsdf(material.node_tree, s, subsurface)
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node_names.add(s.name)
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elif s.node_tree.name == "MMDShaderDev":
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__switchToPrincipledBsdf(material.node_tree, s, subsurface)
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node_names.add(s.name)
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# remove MMD shader nodes
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nodes = material.node_tree.nodes
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for name in node_names:
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nodes.remove(nodes[name])
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def __switchToPrincipledBsdf(node_tree: bpy.types.NodeTree, node_basic: bpy.types.ShaderNodeGroup, subsurface: float, node_alpha: Optional[bpy.types.ShaderNodeGroup] = None):
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shader: bpy.types.ShaderNodeBsdfPrincipled = node_tree.nodes.new("ShaderNodeBsdfPrincipled")
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shader.parent = node_basic.parent
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shader.location.x = node_basic.location.x
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shader.location.y = node_basic.location.y
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alpha_socket_name = "Alpha"
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if node_basic.node_tree.name == "MMDShaderDev":
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node_alpha, alpha_socket_name = node_basic, "Base Alpha"
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if "Base Tex" in node_basic.inputs and node_basic.inputs["Base Tex"].is_linked:
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node_tree.links.new(node_basic.inputs["Base Tex"].links[0].from_socket, shader.inputs["Base Color"])
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elif "Diffuse Color" in node_basic.inputs:
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shader.inputs["Base Color"].default_value[:3] = node_basic.inputs["Diffuse Color"].default_value[:3]
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elif "diffuse" in node_basic.inputs:
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shader.inputs["Base Color"].default_value[:3] = node_basic.inputs["diffuse"].default_value[:3]
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if node_basic.inputs["diffuse"].is_linked:
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node_tree.links.new(node_basic.inputs["diffuse"].links[0].from_socket, shader.inputs["Base Color"])
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shader.inputs["IOR"].default_value = 1.0
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shader.inputs["Subsurface Weight"].default_value = subsurface
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output_links = node_basic.outputs[0].links
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if node_alpha:
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output_links = node_alpha.outputs[0].links
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shader.parent = node_alpha.parent or shader.parent
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shader.location.x = node_alpha.location.x
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if alpha_socket_name in node_alpha.inputs:
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if "Alpha" in shader.inputs:
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shader.inputs["Alpha"].default_value = node_alpha.inputs[alpha_socket_name].default_value
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if node_alpha.inputs[alpha_socket_name].is_linked:
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node_tree.links.new(node_alpha.inputs[alpha_socket_name].links[0].from_socket, shader.inputs["Alpha"])
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else:
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shader.inputs["Transmission"].default_value = 1 - node_alpha.inputs[alpha_socket_name].default_value
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if node_alpha.inputs[alpha_socket_name].is_linked:
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node_invert = node_tree.nodes.new("ShaderNodeMath")
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node_invert.parent = shader.parent
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node_invert.location.x = node_alpha.location.x - 250
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node_invert.location.y = node_alpha.location.y - 300
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node_invert.operation = "SUBTRACT"
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node_invert.use_clamp = True
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node_invert.inputs[0].default_value = 1
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node_tree.links.new(node_alpha.inputs[alpha_socket_name].links[0].from_socket, node_invert.inputs[1])
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node_tree.links.new(node_invert.outputs[0], shader.inputs["Transmission"])
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for l in output_links:
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node_tree.links.new(shader.outputs[0], l.to_socket)
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