SPOTLIGHT command

Specify target position: Specifies the location of the target.; Note: The target is the point at which the spotlight is focused.

Intensity factor: Specifies the intensity of the light.; Note: Enter an intensity value between 0.00 and the maximum value supported by your system (max float = maximum value of a floating-point number).; Note: When LIGHTINGUNITS system variable’s value is 0, this option is named Intensity.

Photometry: Specifies the photometric properties of the light.; Note: This option is only available when LIGHTUNITS value is 1 or 2.

Illuminance: Enter the illuminance expressed in lux (Lx) or foot-candles (Fc).

Hotspot: Specifies the angle of the hotspot, the area of light concentration.; Note: The Hotspot angle represents the angle of the central light cone.; Note: The angle determines the size of the hotspot, regardless the distance of target.

Falloff: Specifies the angle of weaker illuminations surrounding the hotspot.; Note: The Falloff angle represents the angle of the full light cone.; Note: Outside of the falloff, there is no light.; Note: If a Falloff angle that is smaller than the Hotspot angle is entered, the latter is set equal to the Falloff angle. When a surface is illuminated by a spotlight, there is an area of maximum illumination (hotspot) that is surrounded by an area of lesser intensity (falloff).; Note: The difference between the hotspot angle and the falloff angle defines the area of lesser light intensity. If the falloff angle and the hotspot angle are almost equal, the edge of light cone is rather sharp. The greater the difference between both angles, the softer the edge of the light cone.

Sharp: Displays shadows with sharp edges.; Note: Use this option to increase performance.

soft sAmpled: Displays realistic shadows with softer shadows based on extended light sources.

Shadow sample: Specify the sampling size of the shadow.; Note: Larger numbers are more accurate but take longer to render.

Visible: Casts a shadow that represents shapes (more accurate) or is rectangular (faster to render).

Attenuation: Specifies how the illumination falls off with distance from the light.

None: No attenuation so that the distance to the light source has no influence.

Inverse linear: Attenuation is the inverse of the linear distance from the light.; Note: At a distance of 2 units from the light source, light is half as strong. At a distance of 4 units, light is one quarter as strong.

inverse Squared: Attenuation is the inverse of the square of the distance from the light.; Note: At a distance of 2 units, light is one quarter as strong. At a distance of 4 units, light is one sixteenth as strong.

attenuation start Limit: Defines the point where the light starts to shine, measured from the center of the light.

attenuation End limit: Defines the point where the light stops to shine, measured from the center of the light.

filterColor: Specifies the color of the light.; Note: When the LIGHTUNITS system variable’s value is 0, this option is named Color.

Enter true color: The RGB color model is an additive color model in which red, green, and blue light are added together in various ways to reproduce a broad array of colors. The component values are stored as integer numbers in the range 0 to 255, the range that a single 8-bit byte can offer (by encoding 256 distinct values).

Hsl: Specifies the color using three parameters Hue, Saturation and Lightness.

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