.py

# Blender 質感・マテリアル設定実践テクニック 2-02-1.blend
import bpy
def init_engine():
    """レンダリングエンジンの設定をします。"""
    bpy.context.scene.render.engine = 'CYCLES'
    bpy.context.scene.cycles.samples = 1_024
def init_material():
    """マテリアルの設定をします。"""
    material = bpy.data.materials['Material']
    assert isinstance(material, bpy.types.Material)
    material.use_nodes = True
    node_tree = material.node_tree
    assert isinstance(node_tree, bpy.types.ShaderNodeTree)
    nodes = node_tree.nodes
    def remove_material_nodes():
        for node in nodes:
            assert isinstance(node, bpy.types.ShaderNode)
            if node.label.endswith(' del'):
                nodes.remove(node)
    def add_material_nodes():
        x_offset = 500
        principled_bsdf = nodes.new('ShaderNodeBsdfPrincipled')
        assert isinstance(principled_bsdf, bpy.types.ShaderNodeBsdfPrincipled)
        principled_bsdf.label = principled_bsdf.name + ' del'
        principled_bsdf.location = (x_offset + 10, 300)
        principled_bsdf.inputs['Base Color'].default_value = (0.038, 0.238, 0.799, 1.000)
        principled_bsdf.inputs['Roughness'].default_value = 0.0
        if 'Material Output' in nodes:
            material_output = nodes['Material Output']
        else:
            material_output = nodes.new('ShaderNodeOutputMaterial')
            material_output.location = (x_offset + 300, 300)
        node_tree.links.new(material_output.inputs[0], principled_bsdf.outputs[0])
    remove_material_nodes()
    add_material_nodes()
def init_compositor():
    """コンポジットの設定をします。"""
    bpy.context.scene.use_nodes = True
    node_tree = bpy.context.scene.node_tree
    assert isinstance(node_tree, bpy.types.CompositorNodeTree)
    nodes = node_tree.nodes
    def remove_compositor_nodes():
        for node in nodes:
            assert isinstance(node, bpy.types.CompositorNode)
            if node.label.endswith(' del'):
                nodes.remove(node)
    def add_compositor_nodes():
        y_offset = -400
        render_layers = nodes['Render Layers']
        composite = nodes['Composite']
        denoise = nodes.new('CompositorNodeDenoise')
        assert isinstance(denoise, bpy.types.CompositorNodeDenoise)
        denoise.label = denoise.name + ' del'
        denoise.location = (330, y_offset + 356)
        denoise.prefilter = 'FAST'
        node_tree.links.new(denoise.inputs[0], render_layers.outputs[0])
        color_balance = nodes.new('CompositorNodeColorBalance')
        assert isinstance(color_balance, bpy.types.CompositorNodeColorBalance)
        color_balance.label = color_balance.name + ' del'
        color_balance.location = (550, y_offset + 385)
        color_balance.correction_method = 'OFFSET_POWER_SLOPE'
        color_balance.power = (1.3, 1.3, 1.3)
        color_balance.slope = (1.3, 1.3, 1.3)
        node_tree.links.new(color_balance.inputs[1], denoise.outputs[0])
        node_tree.links.new(composite.inputs[0], color_balance.outputs[0])
    remove_compositor_nodes()
    add_compositor_nodes()
init_engine()
init_material()
init_compositor()
print('Done.')