Table of Contents

This page provides information about the Sample Render Element in V-Ray for Cinema 4D.


The Sample Rate Render Element displays the work being done by the image sampler as a red, green, and blue image. This render element displays the process while rendering is done and once the render completes.

A color is assigned to each pixel according to how many primary samples are being taken by the Image Sampler:

  • The Blue channel contains the areas that reached the desired image quality with few primary samples.
  • The Green channel shows areas that require more antialiasing (AA) samples to clean up than the Blue areas but managed to achieve the Noise Threshold within the number of AA rays used.
  • The Red channel contains the parts of the image that didn't reach the desired quality threshold, as they got to the maximum amount of AA rays before reaching the Noise Threshold.
  • If the Image Sampler type is Progressive, the White areas will represent the areas the sampler is currently working on, as they were found to not satisfy the Noise Threshold as of yet.

The way to ensure a render is correctly computed is to minimize the amount of red color in this render element. Raising secondary sampling through any means will reduce the primary sampling work in the corresponding areas, effectively moving red areas into green ones and green ones into blue ones. Lowering secondary samples per pixel will do the opposite, potentially leading to more red areas. The suggested way to minimize the red color and optimize render times is to increase the Max Subdivs value (if the previous render was still noisy) or increase the Noise Threshold value (if the previous render was clean but took too long to complete).

Note that some specific image features, like high-frequency detail often found in fur and hair or high-contrast zones, will likely always try to reach the maximum sampling, so some red will appear there. This is perfectly normal and doesn't slow down the rest of the rendering while ensuring the problematic parts of the image clean up as per the user's settings.

UI Path: ||V-Ray|| > Render Elements > Sample Rate

How to add a render element to a scene


Enable Deep OutputSpecifies whether to include this render element in deep images.

Color MappingApplies the color mapping options specified in the Color Mapping rollout of the V-Ray tab in the Render Settings window to this render element.

Consider for Anti-Aliasing – When enabled, anti-aliasing is used where possible.

Filtering – Applies an image filter to this channel.

Derive Raw Channels – Generates data in the raw channels by combining the respective color and the filter color channels.

Vfb Color Corrections – Applies the post-render color adjustments made from the VFB.

Denoise – Enables the render element's denoising, provided the Denoiser is enabled.

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