OS X Sierra 10.12.6,
NVIDIA GeForce GT 750M 2048 MB
Intel Iris Pro 1536 MB
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.
- Denoised image with artefacts
- Non-denoised image without artefacts
- .blend file