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To activate this parameter and specify a value, use the Use Local Subdivs parameter under the V-Ray > DMC Sampler tab in the Render Settings window.  This parameter is not available when the renderer is set to CUDA.

Light cutoff threshold – Specifies a threshold for the light intensity, below which the light will not be computed. This can be useful in scenes with many lights, where you want to limit the effect of the lights to some distance around them. Larger values cut away more from the light; lower values make the light range larger. If you specify a value of 0.0, the light will be calculated for all surfaces. This parameter is not available when the renderer is set to CUDA.

 

Parameters - Shadows

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Shadows – Enables or disables the tracing of shadows.

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