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Creating and animating rainbow
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Start
by opening an image where you can see a good sky area.
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| Create
a rectangular selection using rectangular marquee tool. Create
a new layer and fill the selection with the default spectrum
gradient in linear mode. |
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| Press
Ctrl+T. Right click the layer and select warp. |
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| Adjust
nodes to get the shape as shown. |
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| Remove
the overlapping area using eraser tool. |
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| Change
the layer mode to overlay and opacity to 80%. |
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| Click
the add layer mask button from the bottom of the layer
palette. |
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| Create
a rectangular selection of the file size using rectangular
marquee tool. |
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| Press
Ctrl+Alt+D to feather the selection. |
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| Fill
the e selection with black color. Unlink the mask and layer
content thumbnail form layer palette. Select the mask
thumbnail. Press Ctrl+T and rotate a bit. |
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| Open
animation window. For the first frame make sure the rainbow is
hidden completely behind the mask. |
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| Duplicate
frame. Select mask thumbnail. Move it to make the rainbow
completely visible. |
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| Press
tween button in the animation window. Apply settings as shown. |
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| Press
Ctrl+Alt+Shift+S to save an optimized animated GIF. |
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