Photoshop: increase the number of alpha channels allowed

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Photoshop limit you to 53 Alpha Channels. Please raise that limit to something like 500. 53 where did that limit come from. There seems to be no limit on layer, Layer mask and paths.

If you can't raise that limit then let us save selections as path with a name as well as named alpha channels. Having to convert a selection to work path then renaming it or copying and renaming it a pain.
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John McAssey

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Posted 7 years ago

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Chris Cox

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There are limits on layers, and the number of layer masks is limited by the number of layers: 8000. Paths have a limit, but I can't recall the number offhand.

Alpha channels are limited by a number of factors. Even getting the count up to 53 was kind of tricky (hint: plus 4 for color, and another 7 indices for internal use).

It would help if you told us why you were saving that many selections.
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John McAssey

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If it was tricky putting alpha channels into the channels palette then how about adding a selections palette where selections are save in a straight forward manner instead of being tricky and saving them where a trick in needed.
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PECourtejoie, Champion

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Chris, the trick/workaround in this case would be to save channels as layer masks? (maybe in a dedicated group?)
Ah ah! 64channels. Are the hidden ones LAB HSLB?
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Chris Cox

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Quick Select mask, Layer Mask, Filter Mask, etc.
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John McAssey

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One would need to have layers to save layer mask. I'm using Channels to map the location and shapes of images in Photo Collage Templates. The Channels are being used to position transform and align smart object layers created by placing any Photoshop supported image file type. RAW PSD PNG etc. The alpha chanel is also use for a layer mask to act as a cropping mask to constrain the placed smart object to the shape and place of its alpha channel. To create a collage with more the 53 images I need to create several Collage templates populate them and then populate an extra template so I can populate it with the populated collages PSD files generated because of the 53 alpha channels limits.

Here is a link to my Photoshop Photo Collage Toolkit Documentation. The toolkit consists of four template rules and eight Photoshop scripts.
http://www.mouseprints.net/old/dpr/Ph...

the download link is http://www.mouseprints.net/old/dpr/Ph...
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christoph pfaffenbichler, Champion

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»One would need to have layers to save layer mask. ... The alpha chanel is also use for a layer mask to act as a cropping mask ...«
As you seem to use them as Layer Masks anyway I would recommend using empty Groups to store them and then moving the SOs into those.
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John McAssey

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They are indeed used as layer mask on placed image files smart object layers that are placed into the template by scripts. The template itself may have only the required background layer. Background layers do not support transparency so it can not have a layer mask. I do not want to add hundreds of unused layers just to be able to save the number of selections I need.
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John McAssey

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I want the process of creating photo collage template PSD files to be easy not complicate hard process that is error prone. Right now all a template need to be is a Background layers and some Alpha channels that map the locations, size, shape and stacking order a user want images placed in over the background layer. Simple peace of cake. Create a selection save selection as alpha channel name "Image n" repeat for as many images you want in the collage. Having to create Groups to add layers, create selections, add layer mask complicates the process of creating template files and complicates the processing of the templates files and increases file side just because Photoshop limits the number of selections you can store in alpha channels. Selections are easy to create save as Alpha Channels and Alpha channels are easy to load. Create selection save selection load selection easy to do and under stand. Creating a Path is not as easy to do because of the way the have to rename the work path. The is no save path by name. You create a work path then rename it a make sure it not active so you can create the next one and you can not move paths around easily like you can selections.