General
Parameters
Intensity
Options
Sampling

Shadows

Notes

General

The VRay Direct Light is a V-Ray specific light source plugin that can be used to create physically accurate area lights.

Parameters

VRay Direct LightIntensity

Enable - turns the VRay Direct Light on and off.

 

Intensity - this value determines the light intensity.

 

Color - specifies the color of the light.

 

Options

 

Affect diffuse - this determines whether the light is affecting the diffuse properties of the materials.

 

Affect specular - this determines whether the light is affecting the specular of the materials.

Sampling

Photon Subdivs- this value is used by V-Ray when calculating the Global Photon Map. Lower values mean more noisy results, but will render faster. Higher values produce smoother results but take more time.

 

Caustic Subdivs- this value is used by V-Ray when calculating Caustics. Lower values mean more noisy results, but will render faster. Higher values produce smoother results but take more time.

Shadows

Shadows - when on (the default), the light casts shadows. Turn this option off to disable shadow casting for the light.

 

Shadow bias - bias moves the shadow toward or away from the shadow-casting object (or objects). If the Bias value is too low, shadows can "leak" through places they shouldn't, produce moire patterns or making out-of-place dark areas on meshes. If Bias is too high, shadows can "detach" from an object. If the Bias value is too extreme in either direction, shadows might not be rendered at all.

 

Shadow Radius - adjusts the softness of non area shadows.

 

Shadow Subdivs - this value controls the number of samples V-Ray takes to compute lighting. Lower values mean more noisy results, but will render faster. Higher values produce smoother results but take more time. Note that the actual number of samples also depends on the DMC Sampler settings.

 

Shadow Color - this parameter specifies a shadow color for this light. Note that any other color than black is not physically correct.

Notes