Since this setting cuts off indirect lighting contributions (one example would be the headlight of a car that depends on a lot of indirect effects to look correct), it should only be applied when the rendering has to be accelerated at the expense of physical accuracy. Note that setting this attribute to a value larger than the default of 0.95 can lead to extremely long render times.īounds the maximum number of vertices (bounces) of light paths to contribute to the result. Additionally, the render call will return 1 in this case indicating to the application that further render calls will have no more effect. As soon as the ratio of converged pixels of the entire image is above this given threshold, Iray Photoreal returns the final result for forthcoming render requests. If the progressive rendering quality is enabled, this attribute specifies a threshold that controls the stopping criterion for progressive rendering. Render times will change roughly linearly with the given value, i.e., doubling the quality roughly doubles the render time. A higher quality setting asks for better converged pixels, which means a longer rendering time. This attribute is a relative quality factor for this threshold. If disabled, rendering will not stop based on the convergence quality and no progress messages will be issued for the current convergence quality.Ī convergence estimate for a pixel has to reach a certain threshold before a pixel is considered converged. The convergence quality estimate is only available in the non-interactive render mode and can, in addition, be enabled and disabled with this attribute. The render call will return 1 if the rendering loop is terminated by this termination criterion. The maximum time in seconds is compared to the rendering time since the beginning of this progression. The maximum number of samples is compared to the number of samples since the beginning of this progression.
Longer times will generally increase rendering efficiency, while shorter times yield more frequent updates.Ĭontrols the minimum number of samples that need to be rendered before the progressive render loop is allowed to terminate by any of the termination criteria. The update interval time in seconds is compared to the rendering time since the beginning of this batch render call. Do check out the rest of the thread though for other gems!Ĭontrols the minimum number of samples that need to be rendered per render call in the progressive render loop. I found it incredibly helpful and want to keep it bookmarked for myself as well. This info about the Rendering Settings come directly from a forum post by LuucEarth.
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