2008

In the next illustration, the same scene renders much brighter with Noise
Filtering set to None. Note, however, the unevenness of the illumuniation.
Noise Filtering=None
In cases like this, you can achieve superior results with slightly longer rendering
times by setting Noise Filtering to Standard and using a sky portal on page
4999 in the window opening, as shown in the following illlustration:
mental ray Renderer | 6111