In the Menu Bar, click Edit > Preferences, then on the left side of the dialog box, select Render Settings.
Use Image Samples - Sets the number of samples taken during still frame antialiasing. Higher values produce a cleaner result, while lower values reduce the render time. A value of 256 is a good starting point, but may be too low for interior scenes with full global illumination. Use this option when wanting to only render a set number of frames. For example, if you want 256 frames rendered, you would set Use Image Samples to 256.
Use Time - Uses time, instead of image samples, to set the maximum time it takes to render all still antialiased frames. More time produces higher quality images, but uses more of your CPU. Less time reduces the quality of the image, but has less impact on your CPU. Use this option when wanting to render all frames in a specify amount of time.
Adaptive Sampling - Enables the raytracer to skip regions that are already smooth and focus on regions that are still noisy.
Use Clamping Value - Activates clamping of bright pixels to eliminate white spots after antialiasing. The value sets the maximum value for a white pixel. Activating clamping and reducing the value, reduces the maximum resulting image color range.
A pixel filter weighs the image samples taken per pixel and therefore controls the antialiasing quality of the rendering. High image filter sizes may result in blurry image results.
Filter - Uses your preferred filtering method from the list. See Render Settings under Pixel Filter.
Size - Defines the number of neighboring pixels in width and height used for filtering.
Monitor Luminance (cd/m²) - Sets the luminance value of the preferred display. When using photometric parameters, the actual monitor luminance is necessary to reproduce the rendering results with realistic photometric values on the display device.
Enable Photometric Parameters - Enables photometric parameters for newly generated scenes, not to the current scene. For a description of photometric consistent rendering, see Render Settings.
Enable Spectral Raytracing - Enables the optimization of all light colors when rendering an image. In addition to the simulation of more reliable colors of materials, wavelength-based spectral rendering enables the user to illustrate realistic dispersion effects. See Render Settings.
Illuminant - Sets the light spectrum considered to be white. Usually this should be D65 to match daylight. The other option, Equal Energy, uses an equal energy spectrum as white. An equal energy spectrum has an equal value for all wavelengths.
Optimize for Many Light Sources - Optimizes light calculation by reducing the quality slightly, in scenes with many light sources. This increases the rendering performance. See Render Settings.
Enable NURBS Raytracing - Enables NURBS to be raytraced when working with polygons.
BRDF Behaviour - Uses the BRDF value that is appropriate for your scene. For compatibility reasons, you can choose between VRED version 6.0 and older, or newer versions of VRED. See Render Settings.