This parameter does not work with V-Ray GPU. Resolution – Specifies the texture resampling dimensions for importance sampling in order to produce better shadows without affecting how the texture itself is rendered. The value determines the amount of involvement. For more information, see Double Sided example below.Īffect Diffuse – When enabled, the light affects the diffuse properties of the materials.Īffect Specular – When enabled, the light affects the specular of the materials.Īffect Reflections – When enabled, the light appears in the reflections of materials.Īffect Atmospherics – Specifies whether the light influences the atmospheric effects in the scene. Note that you should enable this option when using Portal Lights.ĭouble Sided – When enabled, light is emitted from both sides of the mesh. When disabled, the light does not cast shadows. Shadows – When enabled (default), the light casts shadows. When this option is enabled, the intensity does not decay with distance. No Decay – 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). The visibility of the light with respect to reflections is controlled by the Affect Specular option. This only affects the visibility of the light when seen directly by the camera or through refractions. When disabled, the source is rendered in the current light color. Invisible – When enabled, the shape of the light source is not visible in the render result. See the Directionality example below for illustration. Increasing this value makes the light beam more narrow and concentrates it in one direction. Additional light scaling does not affect this parameter.ĭirectionality – When this value is 0, the light is spread out equally in all directions. Size – Determines the light size measured in scene units. Additional light scaling does not affect this parameter. V Size – Determines the V size of the light measured in scene units. U Size – Determines the U size of the light measured in scene units. Rectangle – Sets the shape to a planar rectangle.Įllipse – Sets the shape to a planar ellipse. Shape – Specifies the structure of the light object. The intensity of the light depends on its size. Radiance (W/m^2/sr) – Visible light surface power measured in watts per square meter per steradian. A typical 100W light bulb only emits between 2 and 3 watts as visible light. This is not the same as the electric power consumed by a light bulb. The intensity of the light does not depend on its size. Radiant Power (W) – Total emitted visible light power measured in watts. Luminance (lm/m^2/sr) – Visible light surface power measured in lumens per square meter per steradian. A typical 100W incandescent light bulb emits about 1500 lumens of light. The intensity of the light will not depend on its size. Luminous Power (Lumens) – Total emitted visible light power measured in lumens. The light surface will appear with the given color in the final image when seen directly by the camera. The light automatically takes the scene units scale into consideration to produce correct result.ĭefault (Scalar) – The color and multiplier directly determine the visible color of the light without any conversion. Using correct units is essential when working with the physical camera exposure. Units – Specifies the light unit of measurement. Intensity – Specifies the strength of the light. The light uses the texture's alpha as opacity map. Make sure that the map checkbox is enabled for the texture to take effect. A high dynamic range texture can be used. Enabled ( ) – Turns the V-Ray Rectangle Light on and off.Ĭolor/Texture – Specifies the color of the light.
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