Denoising + negative lamps = black and white artifacts
Open, ConfirmedPublic


System Information
OS X Sierra 10.12.6,
NVIDIA GeForce GT 750M 2048 MB
Intel Iris Pro 1536 MB

Blender Version
Broken: 2.79

Short description of error
Simple scene with negative lights gives bad artefacts with denoising enabled.

Exact steps for others to reproduce the error
Just render the attached .blend file.

Attachments are:

  • Denoised image with artefacts
  • Non-denoised image without artefacts
  • .blend file



Note that the thumbnail isn't that bad, the full-res version is though, please click on it!