I’ve been told that you can only Photoshop something in front of an existing object, but not behind it – why is that? Also how does it work when something is photoshopped to match the background of the image – when that thing wasn’t even in the original image as the view was blocked? For example you photoshopped someone who’s standing in front of a tree out – how can you photoshop the tree back on that was originally partially blocked by the said person ?
In: Technology
When you have a 2D canvas like a photo, you can only draw on top of the canvas, there is no behind.
However, if you had created the image modern image processing applications are smarter than that: You can have multiple layers on which you work, which at the end are all merged into one and then exported.
So you can have a layer of the background, which is white. Then you have a (transparent) layer for the ground of the forest. Then you have a (transparent) layer with the trees in the forest. And then you have a (transparent) layer with the kids walking between the trees. Did you forget something on ground level just around the kids walking? Well luckily for you all changes are only made the ground level layer while the trees in front of it and the kids in front of it are unaffected by the changes.
So, creating an new image: You can have multiple layers while creating it. Editing a single image: you can only edit what you see.
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