16.20. Starburst
| 16. Alpha to Logo Filters |

### 16.20. Starburst

#### 16.20.1. Overview

Figure 16.381. Example for the “Starburst” filter

“Starburst” applied

This filter fills the active layer's alpha with a starburst gradient and adds a shadow.

It is derived from the “Starburst” script-fu (File → Create → Logos → Starburst in the image window), which creates a logo from a text.

You can use this filter to create shapes filled with the above starburst motif:

Figure 16.382. Starburst script and filter

The “Starburst” Script-Fu script

The “Starburst” filter

This filter uses four layers (three of them will be created by the filter):

Layers after applying the “Starburst” filter

- The “Burst” layer contains the bursting star, created by the Supernova filter.

- The active layer was named layer #2 in the example above. It has been filled with the “Crack” pattern, so the content of this layer doesn't matter. Only the active layer's alpha channel does.

  | Warning
  The image will always be resized to the active layer's size.

- The “Shadow” layer contains a drop shadow in the same shape but slightly extended size of the active layer's alpha channel.

- The “Background” layer: this is a new layer filled with the Background color.

#### 16.20.2. Activate the filter

You can find this filter in the image window menu under Filters → Alpha to Logo → Starburst.

#### 16.20.3. Options

Figure 16.383. “Starburst” options

Effect size (pixels * 30)

  Just ignore this option. It's nonsense. (This is actually the font size option of the Starburst Script-Fu script. You can still use it to vary the offset (size) of the lower right shadow, though: “effect size” * 0.03.)

Burst color

  This color will be passed to the Supernova filter as the color of the bursting star; it defaults to green. A click on the color swatch button brings up the color selector, where you can choose another color.

Background color

  This is the color used to fill the “Background” layer; it defaults to white. When you click on the button, you may choose any other color in the color selector dialog.

16.19. Particle Trace |  | 16.21. Starscape