>the filter doesn't operate on single frames, but considers several previous frames in order to maintain temporal cohesion and to improve quality.
Do you happen to know how bad are the artifacts? I remember temporal antialiasing produced very good results with static scenes, but fell apart on dynamic ones.
no filter: http://brechpunkt.de/q2vkpt/images/path_tracer_720p.png denoised: http://brechpunkt.de/q2vkpt/images/denoised_720p.png
The denoise filter might as well be the main achievement of this project. Edit: note that if I understand correctly, the filter doesn't operate on single frames, but considers several previous frames in order to maintain temporal cohesion and to improve quality.