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Dome Adaptive – Speeds up the rendering by optimising the sampling algorithm for the dome light. No light portals are needed with this setup. Light Cache must be set as the GI engine for this feature.

 

Parameters - Texture

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Use Dome Tex – When enabled, the light uses a texture for the VRayLightDome surface.

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Parameters - Viewport Display

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Show in Viewport – Displays the texture loaded in the Dome Tex slot of the dome light as the environment in the viewport. You can disable the preview, preview only the texture, or preview the texture multiplied by the dome light's intensity.

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Note: The Gamma attribute only affects the preview of the texture in the viewport.

 

Parameters - Options

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Invisible – Controls whether the shape of the VRayLight source is visible in the resulting render. When disabled, the source light is rendered in the current light color, otherwise, the light source itself is not visible in the scene.

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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.

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 – A multiplier for the shadows color. This option is inactive when the renderer is set to V-Ray CUDA.

 

Parameters - Photon Emission

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Caustics subdivs– Used by V-Ray when calculating  Caustics. Lower values mean more noisy results, but faster render. Higher values produce smoother results but take more time to render. This option is inactive when the renderer is set to V-Ray CUDA.

Caustics multiplier – 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 render roll-out section. This option is inactive when the renderer is set to V-Ray CUDA.

UI Text Box

Photon Subdivs and Diffuse Multiplier parameters no longer show in the UI, as they are related to the Photon Map GI engine, which is deprecated. They are still accessible through script. 

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