Lấy Mẫu Vật (Sampling)

Tham Chiếu (Reference)

Bảng (Panel): Render ‣ Sampling

The integrator is the rendering algorithm used to compute the lighting. Cycles currently supports a path tracing integrator with direct light sampling. It works well for various lighting setups, but is not as suitable for caustics and some other complex lighting situations.

Rays are traced from the camera into the scene, bouncing around until they find a light source such as a light, an object emitting light, or the world background. To find lights and surfaces emitting light, both indirect light sampling (letting the ray follow the surface BSDF) and direct light sampling (picking a light source and tracing a ray towards it) are used.

Lượng Mẫu Vật trong Cổng Nhìn (Viewport Samples): Number of samples for viewport rendering. Setting this value to zero enables indefinite sampling of the viewport.

Lượng Mẫu Vật Kết Xuất (Render Samples): Number of paths to trace for each pixel in the final render. As more samples are taken, the solution becomes less noisy and more accurate.

Thời Hạn (Time Limit): Renders scene until time limit or sample count is reached. When the time is set to 0, the sample count is used to determine when the render stops.

Ghi chú

The time limit does not include pre-render processing time, only render time.

Lấy Mẫu Vật Tùy Ứng (Adaptive Sampling)

With adaptive sampling Cycles automatically reduces the number of samples in areas that have little noise, for faster rendering and more even noise distribution. For example hair on a character may need many samples, but the background may need very few.

With adaptive sampling it is also possible to render images with a target amount of noise. This is done by settings the Noise Threshold, typical values are in the range from 0.1 to 0.001. Then render samples can then be set to a high value, and the renderer will automatically choose the appropriate amount of samples.

Ngưỡng của Nhiễu (Noise Threshold): The error threshold to decide whether to continue sampling a pixel or not. Typical values are in the range from 0.1 to 0.001, with lower values meaning less noise. Setting it to exactly 0 lets Cycles guess an automatic value for it based on the total sample count.

Lượng Mẫu Vật Tối Thiểu (Min Samples): The minimum number of samples a pixel receives before adaptive sampling is applied. When set to 0 (default), it is automatically set to a value determined by the Noise Threshold.

Lọc Nhiễu (Denoising)

Denoising removes noise while previewing scenes in Rendered mode in the 3D Viewport or for final renders.

Render (Kết Xuất)

Denoising for the final render can be enabled or disabled with the checkbox. For denoising the image after rendering with the Denoising node, the Data Render Passes also adapt to the selected denoiser.

Khử Nhiễu Hình Ảnh Nguồn Mở (Open Image Denoise): Uses Intel's Open Image Denoise, an AI denoiser which runs on the CPU.
OptiX: Uses an artificial intelligence algorithm to remove noise from renders. It is based on the OptiX -- NVIDIA acceleration engine and therefore has the same GPU requirements as rendering with Optix.

Cổng Nhìn (Viewport)

Denoising for the Rendered mode in the 3D Viewport can be enabled or disabled for with the checkbox.

Tự Động (Automatic): Uses the faster available denoiser for 3D Viewport rendering (OptiX if available, otherwise OpenImageDenoise).
Khử Nhiễu hình ảnh Mở (OpenImageDenoise): Uses Intel's Open Image Denoise, an AI denoiser which runs on the CPU.
OptiX: Uses an artificial intelligence algorithm to remove noise from renders. It is based on the OptiX -- NVIDIA acceleration engine and therefore has the same GPU requirements as rendering with Optix.

Lượng Mẫu Vật Khởi Đầu (Start Sample): Sample to start denoising in the 3D Viewport.

Các Lượt Đầu Vào (Input Passes)

Controls which Render Pass the denoiser should use as input, which can have different effects on the denoised image. Generally, the more passes the denoiser has to denoise the better the result. It is recommended to at least use Albedo as None can blur out details, especially at lower sample counts.

Không (None): Denoises the image using color data.
Albedo: Denoises the image using color and albedo data.
Canh Hàng theo Pháp Tuyến (Albedo + Normal): Denoises the image using color, albedo, and normal pass data.

Bộ Lọc Trước (Prefilter)

Controls whether or not prefiltering is applied to Input Passes for use when denoising. Visible only when using OpenImageDenoise.

Không (None): Does not apply any prefiltering to the input passes. This option retains the most detail and is the fastest, but assumes the input passes are noise free which may require a high sample count. If the input passes aren't noise free, then noise will remain in the image after denoising.
Nhanh (Fast): Assumes the input passes are not noise free, yet does not apply prefiltering to the input passes. This option is faster than Accurate but produces a blurrier result.
Chính Xác (Accurate): Prefilters the input passes before denoising to reduce noise. This option usually produces more detailed results than Fast with increased processing time.

Cao Cấp (Advanced)

Seed (Mầm)

Giá trị hạt cho bộ tích phân kiết tạo các mẫu hình nhiễu khác nhau.

Sử Dụng Mầm Hoạt Họa [biểu tượng đồng hồ] (Use Animated Seed [clock icon]): Changes the seed for each frame. It is a good idea to enable this when rendering animations because a varying noise pattern is less noticeable.

Vùng Mẫu (Pattern)

Random sampling pattern used by the integrator. When Lấy Mẫu Vật Tùy Ứng (Adaptive Sampling) is enabled, Progressive Multi-Jitter is always used instead of Sobol.

Sobol: Uses a Sobol pattern to decide the random sampling pattern used by the integrator. See Sobol sequence on Wikipedia for more information.
Đa Biến Động Lũy Tiến (Progressive Multi-Jitter): Uses a progressive multi-jitter pattern to decide the random sampling pattern used by the integrator. Its advantage is to provide a well distribution of samples over iterating sample counts. Because of its good distribution over a range of different sample counts, this sample pattern is used for Adaptive Sampling. See this Pixar paper for more information.

Dịch Chuyển trong Số Lượng Mẫu Lấy (Sample Offset): The number of samples to skip when starting render. This can be used to distribute a render across multiple computers then combine the images with bpy.ops.cycles.merge_images

(Scrambling Distance Multiplier)

Lower values Reduce randomization between pixels to improve GPU rendering performance, at the cost of possible rendering artifacts if set too low.

Tự Động (Automatic): Sử dụng một công thức để tùy ứng cường độ khoảng cách xáo trộn dựa trên số lượng mẫu lấy.

Cổng Nhìn (Viewport): Uses the Scrambling Distance value for the viewport rendering. This will make the rendering faster but may cause flickering.

Lượng Bật Nẩy Tối Thiểu của Ánh Sáng (Min Light Bounces): Minimum number of light bounces for each path, after which the integrator uses Russian Roulette to terminate paths that contribute less to the image. Setting this higher gives less noise, but may also increase render time considerably. For a low number of bounces, it is strongly recommended to set this equal to the maximum number of bounces.

Số Lần Bật Nẩy Tối Thiểu của Tia độ trong suốt (Min Transparent Bounces): Số lần bật nẩy tối thiểu của tia về tính trong suốt. Đặt giá trị này cao sẽ giúp thuyên giảm lượng nhiễu trong những lần bật nẩy đầu tiên, song đối với những hình học phức tạp, như tóc và thể tích, nó có thể không hiệu suất lắm.

Ngưỡng Ánh Sáng (Light Threshold): Probabilistically terminates light samples when the light contribution is below this threshold (more noise but faster rendering). Zero disables the test and never ignores lights. This is useful because in large scenes with many light sources, some might only contribute a small amount to the final image, and increase render times. Using this setting can decrease the render times needed to calculate the rays which in the end have very little affect on the image.

Mẫu Vật của Tầng (Layer Samples)

When render layers have per layer number of samples set, this option specifies how to use them.

Sử dụng (Use): The render layer samples will override the set scene samples.
Giới Hạn (Bounded): Bound render layer samples by scene samples.
Bỏ Qua (Ignore): Ignore render layer sample settings.