Removing Sky Using CS3

BlindMonkey

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27 Apr 2008 - 8:50 PM

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Had a trip out to Bridgenorth today, got some good shots, but one shot the sky was very dull. I have tried to remove the sky to replace it with another sky shot. I have used the magnetic lasso tool to select the sky the click edit - cut, but the sky will not dissapear.

Can anyone help

Thanks in advance

Ian

lobsterboy (Site Moderator)

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27 Apr 2008 - 9:30 PM

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LOL - I did have to check if that site existed

Anyway as for replacing a sky Google is your friend

Photogene

6

28 Apr 2008 - 1:16 AM

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Why not try CS3's new auto blend feature see if that works, saves you having to selectively remove the sky in the first place.
Begin by converting your image to a layer that supports transparency, by holding down the alt key and double clicking on the background layer in the layers palette. Next open up your replacement sky image, and convert that in the same way. Now drag the replacement sky onto the other image, (make sure the sky just slightly overlaps where the sky meets the land in the original image).
Next hold down the shift key and click on both layers in the layers palette, so they're both selected. Go upto edit and select auto blend layers, and when it's done its thing, you should have two layer masks in your layers palette, one white and one black. Click on the black layer mask to select it, then paint with white and a very soft-edged brush set to 40% opacity, over the sky to reveal the replacemnt sky beneath, that was hidden in the auto blending process. Three or four passes should do. If you should paint over any parts of the land you didn't mean to, just switch your brush to black to undo.

takui neko

8

28 Apr 2008 - 6:43 PM

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How dull is dull?

Maybe you can just copy and paste a channel.
Go "Channels>
Pick a channel with high contrast and detail) >
ctrl+A (Selects all) >
ctrl+C (Copy) > Click on RGB >
Go to "Layers" > ctrl + V (Paste) as a layer.>
Set some contrasty blending mode (Overlay or Soft Light) then add a mask and paint out the parts you dont want. (Land, sea, etc...)

Maybe then it won't look dull anymore without the need to replace the sky. :o)

Edit: You can add the other sky the same way, paste as a layer and change the blending mode, then add a mask and piant what you dont need with a soft brush.

BlindMonkey

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28 Apr 2008 - 8:48 PM

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Thanks guys, all these techniques seem very helpfull, but a bit to advanced, i will try to give them all a go and hopefully they will help.

If anyone has any easier techniques it would be much appreciated

Thanks Again

Ian