Create a eye iris in GIMP


Create a new image…
–Dimensions: 1024px by 1024px

Rename the base layer to “Pinched”

Add Transparency…
–Layer -> Transparency -> Add Alpha Channel

Apply “Solid Noise” filter…
–Filters -> Render -> Solid Noise
—-Check: “Randomize”
—-Detail: 15
—-X & Y Size: 4.0

Image

Apply multiple “Difference Cloud” filters…
–Filters -> Render -> Difference Clouds
—-Check: “Randomize”
—-Detail: 15
—-X & Y Size: 4.0

–Press “Control + f” to repeat filter
—-Repeat 5-8 times

Image

Apply multiple “Pinch” filters…
–Filters -> Distorts -> Whirl and Pinch
—-Whirl angle: 0.00
—-Pinch Amount: 0.650
—-Radius: 1.3

–Press “Control + f” to repeat filter

Image

Ellipse select on pinched layer…
Click “Ellipse Select” tool
-or-
Press “e”

Make a canvas sized circle…
–Click at 0,0
–hold “Shift”
–Drag to 1024

Shrink the selection…
–Select -> Shrink
–Shrink: 20px

Invert Selection…
–Select -> Invert

Clear background…
–Edit -> Clear

Image

Create a New Layer
–Name: Polar Coords
–Width/Heigth: 1024
–Fill Type: Transparency

Select Polar Coords Layer.

Apply Stretched Solid Noise…
–Filters -> Render -> Solid Noise
—-Check: Randomize
—-Detail: 15
—-X size: 16.0
—-Y size: 2.0

Image

Apply Polar Coordinates to Solid Noise…
–Filters -> Distorts -> Polar Coordinates
—-Circle depth %: 100.00
—-Offset Angle: 0.00
—-Check: To Polar

Image

Move “Polar Coords” layer above pinched layer.
Set “Polar Coords” layer mode to overlay.

Image

Select the Pinched Layer

Click the “Fuzzy Select Tool”
-or-
Press “u”

Click in the empty space around the circle

Grow the Selection
–Select -> Grow
—-Grow Amount: 60 pixels

Feather the Selection
–Select -> Feather
—-Feather: 80 pixels

Create a New Layer
–Name: Edge Ring
–Width/Heigth: 1024
–Fill Type: Transparency

Select Edge Ring Layer.

Set Forground Color to Black.

Bucket Fill Selection with Black.

Select None
–Select -> None
-or-
–Press “Shift + Control + a”

Make “Edge Ring” the top layer.

Adjust “Edge Ring” layer settings…
–Layer Mode: Multiply
–Opacity: 75.0

Image

Create a New Layer
–Name: Color
–Width/Heigth: 1024
–Fill Type: Transparency

Make “Color” the top layer.

Pick a Foreground Color…
–Value and Saturation dont matter.
–“0079ff” is a nice blue.

Bucket Fill the “Color” Layer with color.

Adjust “Color” layer settings…
–Mode: Color
–Opacity: Adjust to Taste
—- ~40% works well for “0079ff – Blue”

Image

Select the “Pinched” Layer

Click the “Fuzzy Select Tool”
-or-
Press “u”

Click in the empty space around the circle

Invert the Selection
–Select -> Invert
or
–Press “Control + I”

Shrink the Selection
–This determines the size of the pupil.
–Shrink: To Taste (~280 pixels works well)

Feather Selection.
–Select -> Feather
–Feather: 30.00 pixels

Create a New Layer.
–Name: Pupil
–Width/Heigth: 1024
–Fill Type: Transparency

Make “Pupil” the top layer.

Switch to “Pupil” Layer.

Set foreground color to black.

Bucket Fill the selection

Image

Create a New Layer.
–Name: Color 2
–Width/Heigth: 1024
–Fill Type: Transparency

Move “Color 2” layer below “Pupil” layer

Select the “Color 2” layer

Grow Selection (the previous pupil selection)
–Grow: 60px

Pick a Foreground Color…
–Value and Saturation dont matter.
–“ffdd00” is a nice gold.

Bucket Fill the selection.

Select None
–Select -> None
-or-
–Press “Shift + Control + a”

Apply “Gaussian Blur” filter…
–Filters -> Blur -> Gaussian Blur
—-Horiz: 150.0 px
—-Verti: 150.0 px
—-Blur Method: RLE

Adjust “Color 2” layer settings.
–Mode: Color
–Opacity To Taste
—- ~45% works well for “ffdd00 – gold”

Image

Tweak “Pinched” layer brightness
–Depending on your colors and noise patterns
–you may want to lighten the “Pinched” layer

Select “Pinched” layer

Adjust Brightness/Contrast…
–Colors -> Brightness-Contrast
—-Brightness : To Taste (+30.0)
—-Contrast : To Taste (-30.0)

Image

This tutorial works great with this blender (http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/Creatin g_Pixar-looking_eyes_in_Blender) tutorial to make some really slick 3D eyes.

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One Response to Create a eye iris in GIMP

  1. SD says:

    Great technique! Don’t laugh but I’m going to turn a pic of our family’s car into one from the movie Cars w/this technique. 🙂

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