You need to render at least X passes to use the denoiser.


This warning appears if the denoising option was enabled, however not enough passes were rendered for it to work. Denoiser needs at least X passes to work.


Possible causes:

  • Rendering was stopped too early by the user
  • Rendering was stopped too early by time/pass/noise limit


Solutions:

  • Wait until at least X passes are rendered
  • Increase or disable the progressive rendering limits
  • Use the "resume rendering" option to render more passes