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Alpha Kanal Einstellung

Community Beginner ,
Mar 28, 2023 Mar 28, 2023

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Hallo ich habe ein Problem bezüglich des Alpha Kanal. 

 

Ich erstelle Renderings von Objekten die einen Alphakanal haben, diese speichere ich im Tiff Format. 

Im Windows System wird das Rendering korrekt dargestellt. Das Objekt steht mit Schattenwurf auf einem transparentem Hintergrund. 

 

Öffne ich das Bild nun in Photoshop um es weiter zu bearbeiten erscheint ein Hintergrund ( von der 3D Software )  dieser stört bei der Weiterverabeitung. Über den Alphakanal kann ich nun den Hintergrund raus löschen, aber dabei verschwindet auch der Schattenwurf. 

 

Gibt es da eine Lösung? Wo ist der Unterschied das Windows es korrekt anzeigt?

 

 

 

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correct answers 1 Correct answer

Community Expert , Mar 29, 2023 Mar 29, 2023

In order for Photoshop to show the layer as transparent it cannot be on a locked Background layer.

While the transparency is stored in the Alpha channel it is not applied to the image.

 

Go to the channels panel, choose the alpha channel and click the "Make Selection" button (left circle).

kevinstohlmeyer_0-1680095773007.png

Then go to your Layers panel and click the Create Layer Mask button

kevinstohlmeyer_1-1680095877841.png

Last save this as a file that supports transparency - a tiff will work (with layers) and a .png.

https://helpx.adobe.com/photoshop/using/saving-selections-alpha-channel-masks.html

...

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Community Expert ,
Mar 28, 2023 Mar 28, 2023

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Hi @Jacques Cément it would be helpful to show a screenshot of the entire workspace image with the layers panel showing.

 

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Community Expert ,
Mar 28, 2023 Mar 28, 2023

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If I now open the image in Photoshop to edit it further, a background ( from the 3D software )  appears this interferes with further processing. I can now delete the background via the alpha channel, but the shadow also disappears. 

By @Jacques Cément

 

Which 3D software are you using? And which version of Photoshop? (You didn't say.)

 

If you are using Photoshop for 3D, it is being removed.

"[Adobe] recommend[s] using Photoshop 22.2 if you continue to need access to Photoshop 3D features. That version will remain accessible to you in the Creative Cloud Desktop application for installation for up to two years from August 2021 (however, the operating system requirements for 22.2 will remain as they were in February 2021 when it was originally released). "

 

Details here:

https://helpx.adobe.com/photoshop/kb/3d-faq.html

 

If it's something else, please clarify.

 

Jane

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Community Beginner ,
Mar 28, 2023 Mar 28, 2023

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I am using 3DS Max, see attached Screenshots

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Community Expert ,
Mar 28, 2023 Mar 28, 2023

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Hi @Jacques Cément I really needed to see the layers panel not the masks. As @jane-e said if your layer is attempting to come in as a 3D smart object layer, there will be issues trying to edit/use that feature as it has been removed.

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Community Beginner ,
Mar 28, 2023 Mar 28, 2023

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A screenshot of the layer is attached. I am not using any 3D Smart Objects

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Community Expert ,
Mar 29, 2023 Mar 29, 2023

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In order for Photoshop to show the layer as transparent it cannot be on a locked Background layer.

While the transparency is stored in the Alpha channel it is not applied to the image.

 

Go to the channels panel, choose the alpha channel and click the "Make Selection" button (left circle).

kevinstohlmeyer_0-1680095773007.png

Then go to your Layers panel and click the Create Layer Mask button

kevinstohlmeyer_1-1680095877841.png

Last save this as a file that supports transparency - a tiff will work (with layers) and a .png.

https://helpx.adobe.com/photoshop/using/saving-selections-alpha-channel-masks.html

 

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Community Beginner ,
Apr 01, 2023 Apr 01, 2023

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Thank you very much Kevin! This worked.

 

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Community Expert ,
Apr 01, 2023 Apr 01, 2023

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Das PSD-Dateiformat funktioniert natürlich auch. Ich benutze aber meistens Tiff (mit Ebenen und Zip Kompression). 

ABAMBO | Hard- and Software Engineer | Photographer

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