This page provides information on the V-Ray Ambient Light in Blender.
Overview
The V-Ray Ambient Light can create light that doesn't come from a specific direction. It can be used to simulate GI, ambient occlusion, etc. It lights the entire scene evenly.
V-Ray Ambient Light is not supported by V-Ray GPU, yet.
General
Enabled – Turns the light on and off.
Color Mode –
Color – Determines the color of the light.
Temperature –
Units –
Intensity – A multiplier for the strength of the light.
Ambient Shade – Controls how the ambient light appears in the scene. A value of 0 shows light coming from all directions, while a value of 1 shows the light coming only from the direction of the light. A Texture can also be attached and blended with the Color using the Mix Strength parameter.
Options
Affect Diffuse – Determines whether the light affects the diffuse properties of the materials.
Affect Specular – Determines whether 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, a multiplier is specified for the effect of the light on the diffuse component.
Specular Contribution – When Affect Specular is enabled, a multiplier is specified for the effect of the light on the specular component.
Atmospheric Contribution – When Affect Atmospherics is enabled, this value determines the amount of involvement.
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.
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 light; lower values make the light range larger. When this value is 0.0, the light is calculated for all surfaces.
LPE Label –
Shadows
Shadows – When enabled (the default), the light casts shadows. Disable this option to turn off shadows for the light.
Shadow bias – Moves the shadow toward or away from the shadow-casting object (or objects). Higher values move the shadow toward the object(s), while lower values move it away. If this value is too extreme, shadows can "leak" through places they shouldn't or "detach" from an object. Other effects from extreme values include Moire patterns, out-of-place dark areas on surfaces, and shadows not appearing at all in the rendering.
Shadow Color – Controls the color of shadows for this light. Note that anything different from black is not physically correct. This option is inactive when using the V-Ray CUDA engine.
Photon Emission
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.
Caustics Multiplier – This value is 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 settings.
