9.5.2

832 • CHAPTER 18
MATERIAL EDITOR • 833
Dispersion
You can blur the reections (see Figure 2) using the Dispersion, Min Samples, Max Samples and
Accuracy settings. The Dispersion value denes the strength of blur for the reections. 0% means no
blur. Increase the value to increase the strength of blur.
Accuracy
This parameter will only be available if Dispersion is set to a value higher than 0%.
Increasing the Accuracy value gives a more accurate blur, but a longer render time also.
This affects the accuracy of the blur — it works by controlling the number of samples used per shading
point. If you enter a value of 100%, the maximum number of samples dened under Max Samples
will be used in critical areas. Lower the value to reduce the number of samples used. You will nd a
more precise explanation of the triumvirate “Min Samples”, “Max Samples” and “Accuracy” where
Area Shadows are explained. The principle of operation is the same.
Min Samples / Max Samples
These parameters will only be available if Dispersion is set to a value higher than 0%.
Increasing Min Samples and/or Max Samples gives a higher quality blur, but a longer render time also.
CINEMA 4D uses samples to create the blur effect and, rather than take samples at even distances, it
concentrates the samples where they are most needed. Max Samples denes the number of samples
used for the most important areas. Min Samples denes the number of samples used for the least
important areas.
Environment
Environment reections are rendered very quickly, since the raytracing mode is not required.