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Photoshop layer edition

Rendering Settings for Photoshop edition

Download files
Pictures and project

fichier.ZIP

Autopano-tutorial-photoshop-edit-1.jpg

Imagine we have a panorama with some area to fix. You just need to select the right output format ( PSD / PSB ) and ensure that the embedded layer is checked.

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In the dialog box, you can see which file will be created but also if it can contains layers, which one will be created. In this sample, you can see that 5 layers will be added to the result of the panorama.

In Photoshop

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Let's analyse the result in photoshop. You can see each individual pictures as individual layers and the final panorama at the bottom. By default, all layers are visible.

When editing a panorama, it best to first hide every layer except the result. Then one by one, unhide a new layer to see how it changes the global result.

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Understanding alphas in layers

Autopano Pro stores for each layer a channel called alpha channel. This channel represents transparency. It tells where real pixels are. You can see in the mini-previews from photoshop layer editor that each individual layer has transparency outside the picture ( the background is the standard dashed checkboard that tells it's transparent ).

We can easily get the selection of an alpha layer by using this tip : right click on the layer, select picture ( for Adobe Photoshop CS3 ). The current selection will be set with the layer alpha channel. Autopano-tutorial-photoshop-edit-5.png

Masking

It's more efficient to work with alpha channel because it allows a quick masking. Here's why. Look at the following screenshot. I added a mask to a layer and paint a gradient into it. The gradient will not be limited by anything in the mask and will fill the whole panorama size. But because of the alpha channel that tells where the pixels are, no pixels can be revealed outside picture area. That's really cool, because when you paint quickly with a brush in the mask, if you don't have to cope with picture extend, it's a real time saver.

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