Lighting-Properties-Properties-Palette

Lighting Properties (Properties Palette)

    Lighting Properties (Properties Palette)

    Available properties depend on the lighting units (standard or photometric) and lighting
    type (Spotlight, Pointlight, or Weblight). Right-click on a light and choose Properties
    to display the Lighting category of the Properties palette.

    List of Options

    The following options are displayed.

    General Properties

    The following settings are available:

    Name

    Specifies the name of the light.

    Type (Light Distribution)

    Specifies the type of light. Determines the distribution of light from the . The type
    of lighting can be changed after the light has been added to the drawings.

    • Spotlight – Default value for Spotlight and Freespot lights.
    • Point – Default for Pointlight and Targetpoint lights.
    • Web – Default for Weblight and Freeweb lights.
    On/Off Status

    Indicates whether the light is on or off.

    Shadows

    Indicates if the light is casting a shadow.

    NOTE:Starting with AutoCAD 2016-based products, shadows are always rendered no matter the
    current status of the Shadows option. This option is maintained for backwards compatibility
    with AutoCAD 2015-based products and earlier releases.

    Hotspot Angle (Spotlight and Freespot only)

    Specifies the angle of the brightest cone of light. Settings can be calculated by using the QuickCalc Calculator.

    Falloff Angle (Spotlight and Freespot only)

    Specifies the outer extremity of the light, where it meets the darkness.

    Intensity Factor

    Magnifies the effect of the skylight.

    Filter Color

    Specifies the secondary color of the light. Represents the color of a physical filter
    over the lamp. Default color is white.

    When lighting is set to photometric units this represents a secondary color filter
    on the light. When lighting is set to generic lighting this represents the total color
    of the light.

    Plot Glyph

    Allows the ability to plot the drawing with the glyphs on.

    Photometric

    The following settings are available:

    NOTE:Photometric related properties are available when the LIGHTINGUNITS system variable
    is set to 1 or 2.

    Lamp Intensity

    Specifies the inherent brightness of the light. Specifies the intensity, flux, or
    illuminance of the lamp. Default units are candela.

    Displays the Lamp Intensity dialog box, where units can be modified.

    Resulting Intensity

    Reports the final brightness of the light. This is determined by the product of the
    Lamp Intensity and the Intensity factor. This value is calculated in the Lamp Intensity
    Dialog box. (Read-only)

    Lamp Color

    Specifies the inherent color of the light in Kelvin temperature or standard. Displays
    the Lamp Color dialog box.

    Resulting Color

    Reports the final color of the light. This is determined by a combination of the Lamp
    Color and the Filter Color. (Read-only)

    Photometric Web

    The following settings are available for Web and Freeweb lights:

    Web File

    Specifies the data file describing the intensity distribution of the light.

    Web Preview

    Displays a 2D slice through goniometric data.

    Web Offsets

    Under the Web offsets panel, the following settings are available under the Weblight
    and Freeweb types of lights:

    Rotation X

    Specifies a rotational offset of the web about the optical X axis.

    Rotation Y

    Specifies a rotational offset of the web about the optical Y axis.

    Rotation Z

    Specifies a rotational offset of the web about the optical Z axis.

    Geometry

    Under the Geometry panel, the following settings are available:

    Position X

    Specifies the X coordinate position of the light.

    Position Y

    Specifies the Y coordinate position of the light.

    Position Z

    Specifies the Z coordinate position of the light.

    Target X

    Specifies the X coordinate target position of the light. (Spotlight, Targetpoint,
    and Weblight only)

    Target Y

    Specifies the Y coordinate target position of the light. (Spotlight, Targetpoint,
    and Weblight only)

    Target Z

    Specifies the Z coordinate target position of the light. (Spotlight, Targetpoint,
    and Weblight only)

    Targeted

    Specifies if the light displays a target grip for orienting the light. Disabled is
    the default for Freespot, Pointlight, and Freeweb. Enabled is the default for Spotlight,
    Targetpoint, and Weblight.

    Attenuation

    In the real world, the intensity of light diminishes over distance. Objects far from
    the light source appear darker than objects near the source. This effect is known
    as attenuation. Attenuation is available under standard lighting workflow only.

    NOTE:Starting with AutoCAD 2016-based products, all lighting is calculated using inverse
    square attenuation. The attenuation related options are maintained for backwards compatibility
    with AutoCAD 2015-based products and earlier releases.

    Under the Attenuation panel the following property settings are available:

    Type

    Controls how light diminishes over distance. The farther away an object is from a
    spotlight, the darker the object appears. Attenuation is also known as decay.

    • Inverse Linear (Standard lights only). Sets attenuation to be the inverse of the linear
      distance from the light. For example, at a distance of 2 units, light is half as strong
      as at the point light; at a distance of 4 units, light is one quarter as strong. The
      default value for inverse linear is half the maximum intensity.
    • Inverse Square (Photometric lights). Sets attenuation to be the inverse of the square
      of the distance from the light. For example, at a distance of 2 units, light is one
      quarter as strong as at the spotlight; at a distance of 4 units, light is one sixteenth
      as strong.
    • None (Standard lights only). Sets no attenuation. Objects far from the point light
      are as bright as objects close to the light.
    Use Limits

    Specifies whether to use limits. The default is No. (Standard lights only)

    Start Limit Offset

    Specifies the point where light starts as an offset from the center of the light.
    The default is 1. (Standard lights only)

    End Limit Offset

    Specifies the point where light ends as an offset from the center of the light. No
    light is cast beyond this point. (Standard lights only)

    Rendered Shadow Details

    Under the Rendered Shadow Details panel, the following settings are available:

    Type

    Specifies the type of shadow cast by the light.

    • Soft (shadow map). Sets the type to Soft. This selection activates additional options
      for Map size and Softness.
    • Sharp (default). Sets the rendered shadow to sharp.
    • Soft (sampled). Sets attenuation to be the inverse of the square of the distance from
      the light. For example, at a distance of 2 units, light is one quarter as strong as
      at the spotlight; at a distance of 4 units, light is one sixteenth as strong.
    Map Size

    Specifies the size of the shadow map. (Soft shadow map type only)

    Softness

    Specifies the softness or fuzziness of the shadow-mapped shadow. (Soft shadow map
    type only)

    Samples

    Specifies the number of shadow rays for the light. (Soft sampled type only)

    Visible Render

    Specifies whether the light shape is actually rendered. The default is No. (Soft sampled
    type only)

    Shape

    Specifies the shape of the lamp bulb. For the Spotlight distribution type selection
    under the General panel, options are Rectangle (default) and Disk. For Point and Web
    types the options are Linear, Rectangle, Disk, Cylinder and Sphere (default). (Soft
    sampled type only)

    Length

    Specifies spacial dimension of shadow shape for the length of the shadow. (Soft sampled
    type only)

    Width

    Specifies spacial dimension of shape for the width of the shadow. (Soft sampled type
    only)

    Radius

    Specifies spacial radius dimension of the shape selection of disk, cylinder, or sphere.
    (Soft sampled type only)

    Learning AutoCad

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