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First time Alpha Channel user

Participant ,
Oct 31, 2019 Oct 31, 2019

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I am trying to replicate this effect:

 

(Link removed by moderator)

 

(1) Red background

(2) Plus hand with Coke image (attached)

(3) Affected by Alpha Channel profile (attached)

 

Have a CokeHave a CokeAs determined by Alpha ChannelAs determined by Alpha Channel

 

What operations are at my disposal in Photoshop to scrutinize both files?

 

TIA,

 

-Ramon

 

 

 

 

 

 

 

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correct answers 2 Correct answers

Community Expert , Nov 01, 2019 Nov 01, 2019

It seems both files are similar or identica in dimensions what will make things easier. Do the following, this is one of possible solutions by the way:

  • Open both files in Photoshop.
  • Add layer mask to image with hand and bottle, select layer then click on Add layer mask button at the bottom of Layers panel. 
  • Alt + Click on layer mask thumbnail i the Layers panel to display layer mask on your screen.
  • Switch to file with black and white version.
  • Select All from Select menu.
  • Copy.
  • Switch back to fi
...

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Community Expert , Nov 01, 2019 Nov 01, 2019

Perhaps we are not talking about the same thing. Here is about alpha channels in Photoshop https://helpx.adobe.com/photoshop/using/saving-selections-alpha-channel-masks.html

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Participant ,
Oct 31, 2019 Oct 31, 2019

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The PNG file are seen in Photoshop as follows:

 

Main Image.jpgAlpha Image.jpg

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New Here ,
Oct 31, 2019 Oct 31, 2019

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Is the result you're wanting to achieve similar to this example? 

 

CokeInHand+RedBG.png

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Participant ,
Oct 31, 2019 Oct 31, 2019

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Yes, indeed.

 

How?

 

-Ramon

 

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Community Expert ,
Nov 01, 2019 Nov 01, 2019

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It seems both files are similar or identica in dimensions what will make things easier. Do the following, this is one of possible solutions by the way:

  • Open both files in Photoshop.
  • Add layer mask to image with hand and bottle, select layer then click on Add layer mask button at the bottom of Layers panel. 
  • Alt + Click on layer mask thumbnail i the Layers panel to display layer mask on your screen.
  • Switch to file with black and white version.
  • Select All from Select menu.
  • Copy.
  • Switch back to file with layer mask and paste.
  • Alt + click on layer mask to go back to normal view and now you should have what you want hand with bottle masked.
  • Add layer below and fill it with color to achieve what is presented to you in revious reply by Fairfax_V.

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Participant ,
Nov 01, 2019 Nov 01, 2019

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Thanks, Bojan:

 

I will perform those steps as soon as I am near my Photoshop equipped PC. I do have a question for all users. It is about the "alpha" file. According to all applications it is black and white, with the silhouette of a hand, as seen on the right side of my post, and that's it.

 

However, when I take that file, alone, to a PC in which the Coca-Cola bottle has neever been, into Autodesk 3ds Max I see the hand and bottle.

 

Let's forget that the file with colors ever existed for this conversation. Assume further that the Alpha image file is read only.

 

Is it possible that the hand+bottle are hidden somehow? Inside some channel? Can Photoshop we told: "Show me everything"?

 

TIA,

 

-Ramon

 

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Community Expert ,
Nov 01, 2019 Nov 01, 2019

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The only way is in layered file like .psd or tiff. Image with hand can be on layer which is hidden but present in Layers panel. Color image can not be hidden in alpha channel.

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Participant ,
Nov 01, 2019 Nov 01, 2019

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[Bojan:] "Color image can not be hidden in alpha channel."

 

I made a remarkable discovery, completely accidental.

 

Definitely the hand, bottle and color are hidden somehow into the "black & white" alpha file (attached)

 

Details later.

 

-Ramon

 

Warning: Ghost InsideWarning: Ghost Inside

 

 

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Community Expert ,
Nov 01, 2019 Nov 01, 2019

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Perhaps we are not talking about the same thing. Here is about alpha channels in Photoshop https://helpx.adobe.com/photoshop/using/saving-selections-alpha-channel-masks.html

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Participant ,
Nov 02, 2019 Nov 02, 2019

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LATEST

[Bojan:] "Perhaps we are not talking about the same thing."

There are indeed two separate issues.

 

(a) My post was simply "How do I do this with alpha channels?" This would be done with normal files, properly handled by Photoshop.

 

(b) I then discovered a problem. It looks like my alpha mask (32-bit PNG) is unusual. It is supported by other software but not by Adobe's. It contains a color image hidden inside. In fact, at this time I am looking for a non-PNG (TIFF as you suggested) alpha masks and original for practice and to make sure that I do things in the Adobe-sanctioned ways.

 

Both are part of my learning process. I am into 3D but of course, 2D is an important component.

 

Thanks again!

 

-Ramon

 

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