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Targa file alpha channel not working correctly

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Message 1 of 7
tuomas.einamoV2MEV
213 Views, 6 Replies

Targa file alpha channel not working correctly

When I do a render where I define the output file, tga-files have a bugged alpha channel. The alpha channel is there, but the whole image is opaque. If I save the same image from the render window, the alpha channel is saved correctly. How do I fix this? 

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6 REPLIES 6
Message 2 of 7

Have you verified, that 32 Bits-per-Pixel is checked? When setting the Save File name in the Render Setup/Common dialog, if you just click on an existing TGA file, the renderer takes the settings of that file regardless of what the RenderView is showing.

wernienst_0-1733130372670.png

 

Message 3 of 7

"the whole image is opaque" --> how do you tell? I.e. what software do you use to check the alpha channel?

Martin Breidt

http://scripts.breidt.net

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→ please 'Like' posts that are helpful; if a post answers your question please click the "Accept Solution" button.
Message 4 of 7

Those are exactly the settings I used. There wouldn't be an alpha channel at all with the lower Bits-per-Pixel values if I have understood correctly. 

Message 5 of 7

I use GIMP to edit the Targa-files. It shows that there is an alpha-channel, but there are no transparent areas in the resulting Targa-file. 

Message 6 of 7

- can you post such a TGA file for us to check?

- can you post a simple .max you use to render such TGA?

- what version of 3ds Max are you using? 

Martin Breidt

http://scripts.breidt.net

EESignature

→ please 'Like' posts that are helpful; if a post answers your question please click the "Accept Solution" button.
Message 7 of 7

Are you sure you have saved TGA files in both cases? I don't see any differences in my TGA files:

wernienst_0-1733406737128.png

However, if I save my rendering as PNG, Photoshop reads the Alpha channel as transparency channel:

wernienst_1-1733406760659.png

 

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