渲 Blender 之出

設諸渲、合節、出式，以 Cycles 或 EEVEE 由 Python API 或命行行渲。涵渲設之優、檔式之擇、後處之流。

用時

• 自動行批渲乃用
• 設渲質與性之衡乃用
• 立後處之合線乃用
• 自一渲生多出式乃用
• 為異硬優渲設乃用
• 立命行之渲流乃用
• 生公示或陳之終出乃用

入

法

1. 設渲擎

設渲擎與基參：

import bpy

def setup_cycles_engine():
    """Configure Cycles render engine."""
    scene = bpy.context.scene
    scene.render.engine = 'CYCLES'

    # Device settings
    scene.cycles.device = 'GPU'  # or 'CPU'

    # Sampling
    scene.cycles.samples = 128  # Viewport: fewer samples
    scene.cycles.use_adaptive_sampling = True
    scene.cycles.adaptive_threshold = 0.01

    # Denoising
    scene.cycles.use_denoising = True
    scene.cycles.denoiser = 'OPTIX'  # or 'OPENIMAGEDENOISE', 'NLM'

    # Light paths
    scene.cycles.max_bounces = 12
    scene.cycles.diffuse_bounces = 4
    scene.cycles.glossy_bounces = 4
    scene.cycles.transmission_bounces = 12
    scene.cycles.volume_bounces = 0

def setup_eevee_engine():
    """Configure EEVEE render engine."""
    scene = bpy.context.scene
    scene.render.engine = 'BLENDER_EEVEE'

    # Sampling
    scene.eevee.taa_render_samples = 64

    # Effects
    scene.eevee.use_bloom = True
    scene.eevee.bloom_threshold = 0.8
    scene.eevee.bloom_intensity = 0.1

    scene.eevee.use_gtao = True  # Ambient occlusion
    scene.eevee.gtao_distance = 0.2

    scene.eevee.use_ssr = True  # Screen space reflections
    scene.eevee.ssr_quality = 0.5

    # Shadows
    scene.eevee.shadow_cube_size = '1024'
    scene.eevee.shadow_cascade_size = '1024'

得： 渲擎已設附宜質之諸值 敗則： 察擎名之拼，驗 GPU 之可用以行 GPU 渲

2. 設解與出式

設出之維與檔式：

def configure_output(width=1920, height=1080, file_format='PNG', color_depth='16'):
    """Set output resolution and format."""
    scene = bpy.context.scene

    # Resolution
    scene.render.resolution_x = width
    scene.render.resolution_y = height
    scene.render.resolution_percentage = 100

    # Aspect ratio
    scene.render.pixel_aspect_x = 1.0
    scene.render.pixel_aspect_y = 1.0

    # File format
    scene.render.image_settings.file_format = file_format

    if file_format == 'PNG':
        scene.render.image_settings.color_mode = 'RGBA'
        scene.render.image_settings.color_depth = color_depth  # '8' or '16'
        scene.render.image_settings.compression = 15  # 0-100

    elif file_format == 'OPEN_EXR':
        scene.render.image_settings.color_mode = 'RGBA'
        scene.render.image_settings.color_depth = '32'  # or '16'
        scene.render.image_settings.exr_codec = 'ZIP'  # or 'DWAA', 'PIZ'

    elif file_format == 'JPEG':
        scene.render.image_settings.color_mode = 'RGB'
        scene.render.image_settings.quality = 90  # 0-100

    elif file_format == 'TIFF':
        scene.render.image_settings.color_mode = 'RGBA'
        scene.render.image_settings.color_depth = color_depth
        scene.render.image_settings.tiff_codec = 'DEFLATE'

    # Frame range (for animations)
    scene.frame_start = 1
    scene.frame_end = 250
    scene.frame_step = 1

得： 出式與解已正設 敗則： 察式名為效，驗色深合於式

3. 設合

立合節之圖：

def setup_compositing():
    """Create compositing node setup."""
    scene = bpy.context.scene
    scene.use_nodes = True

    tree = scene.node_tree
    nodes = tree.nodes
    links = tree.links

    # Clear default nodes
    nodes.clear()

    # Render Layers input
    render_layers = nodes.new(type='CompositorNodeRLayers')
    render_layers.location = (-400, 300)

    # Denoise (if not using Cycles denoiser)
    # denoise = nodes.new(type='CompositorNodeDenoise')
    # denoise.location = (-200, 300)

    # Color correction
    color_correct = nodes.new(type='CompositorNodeColorCorrection')
    color_correct.location = (0, 300)
    color_correct.master_saturation = 1.1
    color_correct.master_gain = 1.05

    # Glare effect
    glare = nodes.new(type='CompositorNodeGlare')
    glare.location = (200, 200)
    glare.glare_type = 'FOG_GLOW'
    glare.threshold = 0.9
    glare.size = 8

    # Vignette
    lens_distortion = nodes.new(type='CompositorNodeLensdist')
    lens_distortion.location = (200, 0)
    lens_distortion.inputs['Dispersion'].default_value = 0.0
    lens_distortion.inputs['Distortion'].default_value = -0.02

    # Mix nodes
    mix1 = nodes.new(type='CompositorNodeMixRGB')
    mix1.location = (400, 250)
    mix1.blend_type = 'ADD'
    mix1.inputs['Fac'].default_value = 0.3

    # Composite output
    composite = nodes.new(type='CompositorNodeComposite')
    composite.location = (600, 300)

    # Viewer output (for preview)
    viewer = nodes.new(type='CompositorNodeViewer')
    viewer.location = (600, 100)

    # Link nodes
    links.new(render_layers.outputs['Image'], color_correct.inputs['Image'])
    links.new(color_correct.outputs['Image'], mix1.inputs[1])
    links.new(color_correct.outputs['Image'], glare.inputs['Image'])
    links.new(glare.outputs['Image'], mix1.inputs[2])
    links.new(mix1.outputs['Image'], composite.inputs['Image'])
    links.new(mix1.outputs['Image'], viewer.inputs['Image'])

得： 合節已設附後處之效 敗則： 察節類名，驗入存，確連有效

4. 設出檔之路

設出檔之命附幀號：

import os
from pathlib import Path

def set_output_path(base_dir, project_name, use_frame_number=True):
    """Configure output file path."""
    scene = bpy.context.scene

    # Create output directory
    output_dir = Path(base_dir) / project_name / "renders"
    output_dir.mkdir(parents=True, exist_ok=True)

    # Set filepath
    if use_frame_number:
        # #### is replaced with frame number (0001, 0002, etc.)
        filename = f"{project_name}_####"
    else:
        filename = project_name

    scene.render.filepath = str(output_dir / filename)

    # Optional: Set file extension explicitly
    # Extension added automatically based on file_format
    # But can override: scene.render.file_extension = '.png'

得： 出之所已立，文路設附幀編 敗則： 察所之權，驗路之 OS 語法

5. 設視層與通

立合用之渲通：

def configure_view_layers():
    """Enable render passes."""
    scene = bpy.context.scene
    view_layer = scene.view_layers['ViewLayer']

    # Enable passes
    view_layer.use_pass_combined = True
    view_layer.use_pass_z = True  # Depth
    view_layer.use_pass_mist = False
    view_layer.use_pass_normal = True
    view_layer.use_pass_vector = True  # Motion vectors
    view_layer.use_pass_ambient_occlusion = True

    # Cycles-specific passes
    cycles = view_layer.cycles
    cycles.use_pass_diffuse_direct = True
    cycles.use_pass_diffuse_indirect = True
    cycles.use_pass_glossy_direct = True
    cycles.use_pass_glossy_indirect = True
    cycles.use_pass_emission = True
    cycles.use_pass_environment = True

    # Cryptomatte passes (for post-production)
    cycles.use_pass_crypto_object = True
    cycles.use_pass_crypto_material = True
    cycles.use_pass_crypto_asset = True

得： 渲通已啟以行進階之合 敗則： 察通是否於當擎可用，驗視層之名

6. 行渲

由 Python API 或命行行渲：

def render_still():
    """Render current frame."""
    bpy.ops.render.render(write_still=True)

def render_animation():
    """Render animation frame range."""
    bpy.ops.render.render(animation=True)

def render_frame(frame_number):
    """Render specific frame."""
    scene = bpy.context.scene
    scene.frame_set(frame_number)
    bpy.ops.render.render(write_still=True)

# Command-line rendering (run from terminal)
# Single frame:
# blender scene.blend --background --render-frame 1

# Animation:
# blender scene.blend --background --render-anim

# Specific frame range:
# blender scene.blend --background --frame-start 10 --frame-end 20 --render-anim

# Override output path:
# blender scene.blend --background --render-output /tmp/render_#### --render-anim

# Use Python script:
# blender scene.blend --background --python render_script.py

得： 渲已行，出檔書於所指 敗則： 察場設，驗鏡存，確出之所可書

7. 自多鏡批渲

自多鏡角而渲：

def render_all_cameras(output_dir):
    """Render scene from all cameras."""
    scene = bpy.context.scene
    original_camera = scene.camera

    cameras = [obj for obj in bpy.data.objects if obj.type == 'CAMERA']

    for camera in cameras:
        # Set active camera
        scene.camera = camera

        # Update output path
        camera_name = camera.name.replace(' ', '_')
        scene.render.filepath = os.path.join(output_dir, f"{camera_name}_####")

        # Render
        bpy.ops.render.render(write_still=True)
        print(f"Rendered from camera: {camera.name}")

    # Restore original camera
    scene.camera = original_camera

得： 場之諸鏡皆生渲 敗則： 察鏡存，驗各鏡位正

8. 優渲性

設性之諸值：

def optimize_performance():
    """Optimize render settings for speed."""
    scene = bpy.context.scene

    if scene.render.engine == 'CYCLES':
        # Tile size (GPU: larger tiles, CPU: smaller tiles)
        if scene.cycles.device == 'GPU':
            scene.render.tile_x = 256
            scene.render.tile_y = 256
        else:
            scene.render.tile_x = 32
            scene.render.tile_y = 32

        # Performance settings
        scene.cycles.use_adaptive_sampling = True
        scene.render.use_persistent_data = True  # Keep scene in memory

        # Reduce light path complexity for preview
        scene.cycles.max_bounces = 4
        scene.cycles.diffuse_bounces = 2
        scene.cycles.glossy_bounces = 2

        # Progressive refine (for viewport)
        scene.cycles.use_progressive_refine = True

    elif scene.render.engine == 'BLENDER_EEVEE':
        # Simplify settings for preview
        scene.render.use_simplify = True
        scene.render.simplify_subdivision = 2

        # Reduce sampling
        scene.eevee.taa_render_samples = 32

得： 渲設已對目硬優之 敗則： 先試以低質，察存之用

驗

• 渲擎已正設（Cycles/EEVEE）
• 解與比合需
• 出式宜境
• 色深與縮設已驗
• 合節連正
• 出之所存且可書
• 文名含幀編若需
• 渲通依需而啟
• 鏡於場中位正
• 試渲畢無誤
• 出檔之式與質正

陷

1. 無鏡：場必有活鏡乃可渲
2. 出路未設：渲前必設 scene.render.filepath
3. 樣不足：低樣致 Cycles 渲生噪
4. 色空誤：察色管之諸值以正示
5. 檔式不容：非凡式皆持諸色深
6. 存溢：大解或繁場或越 RAM
7. GPU 存盡：減瓦大或轉至 CPU 處大場
8. 背景模出：背景模必用 --render-output 旗或設文路
9. 幀號之式：用 #### 自動補幀
10. 合未啟：啟 scene.use_nodes 以用合

參

• create-3d-scene：渲前場之設
• script-blender-automation：批渲自動之形
• render-publication-graphic：公示之出需與式