...

These options are not meant for artists specifically, they are useful options for pipeline considerations or possibly denoise applications outside the renderer and their usage is not required. They are exposed as useful tools for the pipeline so that you do not have to alter RIB files directly.

• Variance:

   Adding this will create a variance image of the specified channel source. Variance shows where more samples may help resolve and image.

  Estimates the statistical variance of values contributing to the pixel in associated source channel.

• MSE: Like variance, but diminishes towards zero as the number of samples increases. Though somewhat noisy itself, this can provide an estimate for the amount of mean-squared-error versus a hypothetical ground-truth image

  MSE: This is the same as variance but divided by the number of samples, basically normalized variance

  .

• Even: This renders the even numbered samples to this AOV
• Odd: This renders the odd number of samples to this AOV

...