5.2. Llum enlluernador GFlare
| 5. Light and Shadow Filters |

### 5.2. Llum enlluernador GFlare

#### 5.2.1. Overview

Figura 17.90. Example for the Gradient Flare filter

Original image

Filter «Gradient Flare» applied

Gradient Flare effect reminds the effect you get when you take a photograph of a blinding light source, with a halo and radiations around the source. The Gradient Flare image has three components: Glow which is the big central fireball, Rays and Second Flares

#### 5.2.2. Activating the filter

This filter is found in the image window menu under Filters → Light and Shadow → Gradient Flare

#### 5.2.3. Opcions

The Settings tab allows you to set manually the parameters while the Selector tab let you choose presets in a list.

Previsualitza

  When Auto update preview is checked, parameter setting results are interactively displayed in preview without modifying the image until you click on OK button.

##### 5.2.3.1. Settings

Figura 17.91. «Gradient Flare» filter options (Settings)

Centre

  You can set X and Y (pixels) coordinates of glint using the input box or by clicking into the preview. The coordinate origin is at the upper left corner.

Paràmetres
  Radi

    The radius of the effect. The slider limits the range of possible values, but using the input box you can enter greater values.

  Rotació

    Turn the effect.

  Hue rotation

    Change the tint (color) of the effect.

  Vector angle

    Turn the Second flares.

  Vector length

    Vary the distance applied for the Second flares.

Supermostratge adaptable

  Settings of the anti-aliasing following parameters like Depth and Threshold. (See also Supersampling .)

##### 5.2.3.2. Selector

Figura 17.92. «Gradient Flare» filter options (Selector)

The Selector tab allows you to select a Gradient Flare pattern, to change it and save it.

New

  When you click on this button, you create a new Gradient Flare pattern. Give it a name of your choice.

Edita

  This button brings up the Gradient Flare Editor (see below).

Copia

  This button allows you to duplicate selected Gradient Flare pattern. You can edit the copy without altering the original.

Suprimeix

  This button deletes the selected Gradient Flare pattern.

#### 5.2.4. Editor del GFlare

The Gradient Flare Editor is also organized in tabs:

##### 5.2.4.1. General

Figura 17.93. «Gradient Flare Editor» options (General)

Opcions de pintura fosforescent
  Opacitat

    Slider and input box allows you to reduce glow opacity (0-100).

  Paint mode

    You can choose between four modes:

    Normal

      In this mode, the glow covers the image without taking into account what is beneath.

    Suma

      Pixel RGB values of glow are added to RGB values of the corresponding pixels in the image. Colors get lighter and white areas may appear.

    Superposa

      Light/Dark areas of glow enhance corresponding light/dark areas of image.

    Pantalla

      Dark areas of image are enlightened by corresponding light areas of glow. Imagine two slides projected onto the same screen.

Opcions de pintura dels raigs

  Options are the same as for Glow Paint Options.

Second Flare Paint Options

  Options are the same as for Glow Paint Options.

##### 5.2.4.2. Lluentor

Figura 17.94. «Gradient Flare Editor» options (Glow)

Degradats

  By clicking on the rectangular buttons, you can develop a long list of gradients. «%» gradients belong to the Editor.

  Radial gradient

    The selected gradient is drawn radially, from center to edge.

  Angular gradient

    The selected gradient develops around center, counter-clockwise, starting from three o'clock if the Rotation parameter is set to 0. Radial and angular gradients are combined according to the Multiply mode: light areas are enhanced and colors are mixed according to CMYK color system (that of your printer).

  Angular size gradient

    This is a gradient of radius size which develops angularly. Radius is controlled according to gradient Luminosity: if luminosity is zero (black), the radius is 0%. If luminosity is 100% (white), the radius is also 100%.

Paràmetres
  Size (%)

    Sets size of glow in percent (0-200).

  Rotació

    Sets the origin of the angular gradient (-180 +180).

  Hue rotation

    Sets glow color, according to the HSV color circle (-180 +180). (Cf. The triangle color selector.)

##### 5.2.4.3. Rays

Figura 17.95. «Gradient Flare Editor» options (Rays)

Degradats

  The options are the same as for Glow.

Paràmetres

  The first three options are the same as in Glow. Two are new:

  # of Spikes

    This option determines the number of spikes (1-300) but also their texture.

  Spike thickness

    When spikes get wider (1-100), they look like flower petals.

##### 5.2.4.4. Second Flares

Figura 17.96. «Gradient Flare Editor» options (Second Flares)

Degradats

  The options are the same as for Glow.

Paràmetres

  Options are the same as in Glow.

Forma de les flamarades secundàries

  Second flares, these satellites of the main flare, may have two shapes: Circle and Polygon. You can set the Number polygon sides. The option accepts 1 side (!), not 2.

Llavor aleatòria

  The random generator will use this value as a seed to generate random numbers. You can use the same value to repeat the same «random» sequence several times.

Randomize

  When you click on this button, you produce a random seed that will be used by the random generator. It is each time different.

5. Light and Shadow Filters |  | 5.3. Llum enlluernador

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