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Invisible – When enabled, the shape of the light source is not visible in the render result. When disabled, the source is rendered in the current light color. This only affects the visibility of the light when seen directly by the camera or through refractions. The visibility of the light with respect to reflections is controlled by the Affect Specular option.

UI Text Box

Note that Portal Lights become automatically invisible.

No Decay – The – The light intensity is inversely proportional to the square of the distance from the light (surfaces that are farther from the light receive less light than surfaces that are closer to the light). When this option is enabled, the intensity does not decay with distance.

Shadows – When enabled (default), the light casts shadows. When disabled, the light does not cast shadows. Note that you should enable this option when using Portal Lights.

Double Sided – When enabled, light is emitted from both sides of the mesh. For more information, see Double Sided example below.

Affect Diffuse – When enabled, the light affects the diffuse properties of the materials. 

Affect Specular – When enabled, the light affects the specular of the materials.

Affect Reflections – When enabled, the light appears in the reflections of materials.

Tex. ResolutionSpecifies the texture resampling dimensions for importance sampling in order to produce better shadows without affecting how the texture itself is rendered. This parameter does not work with V-Ray GPU. Instead, the texture resolution is resized to the specified amount.

Caustic Subdivs – Determines the number of caustic photons emitted from the light source. Lower values mean more noisy results but faster rendering. Higher values produce smoother results but take more time.




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