Location:
• The Render Manager > mental ray (Global Renderer)
• The Render Manager > (expand a pass) > mental ray
• Set the current pass and choose Render > Render > Renderer Options from the Render toolbar.
• Tab: Rendering [Properties Reference]
• Options: Sampling Contrast
The Sampling Contrast sliders help you control adaptive sampling. This is the primary means of image quality control. If the difference between neighboring samples is greater than the sampling contrast value, another level of sampling occurs.
The smaller the value for each color (R, G, B), the greater the amount of sampling that must be done to close the contrast gap between the rendered image and the sampling contrast settings, and the smoother the antialiasing.
This can lead to higher render times, so use the following guidelines to refine your sampling contrast settings:
• Lower the sampling contrast values if aliasing artifacts appear in areas of low contrast, but not high contrast.
• Raise the sampling contrast values if no aliasing artifacts appear. This reduces the overall number of samples and reduces render times.
For more information, see Antialiasing, Sampling, and Filtering Tips & Tricks.
Autodesk Softimage v.7.5