Area Speculars – When enabled, the highlights match the shape of the light. When disabled, highlights are always calculated as if affected by a point light. Affect Diffuse – Determines whether the light affects the diffuse properties of the materials. Affect Specular – Determines whether the light affects the specular of the materials. This means glossy reflections. Affect Atmospherics – Determines whether the light influences the atmospheric effects in the scene. Diffuse Contribution – When Affect Diffuse is enabled, specifies a multiplier for the effect of the light on the diffuse component. Specular Contribution – When Affect Specular is enabled, specifies a multiplier for the effect of the light on the specular component. Atmospheric Contribution – When Affect Atmospherics is enabled, this value determines the amount of involvement. Motion Blur Samples – Specifies the number of samples used to sample the light for motion blur. Caustics Multiplier – Specifies a multiplier for the generated caustics by the selected object. Note that this multiplier is cumulative - it does not override the multiplier in the Caustics Tab of the V-Ray Render Settings. Caustics Subdivs – Only used when calculating Caustics. Lower values mean more noisy results, but render faster. Higher values produce smoother results but take more time. Cut-off Threshold – Specifies a threshold for the light intensity, below which the light is not 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 of the light; lower values make the light range larger. When this value is 0.0, the light is calculated for all surfaces. Store With Irradiance Map – When enabled and GI calculation is set to Irradiance map, V-Ray calculates the effects of the V-Ray IES Light and stores them in the irradiance map. The result is that the irradiance map is computed more slowly but the rendering takes less time. The irradiance map can also be saved for later use. |