Need alpha channel on Strip of images can this be done

[BASE designs]

Greetings,

I am new to the forum although I have been using Xn View for some time now.

I have a problem that I am trying to solve. I have seen that this question was asked before by no answer was given.

Here is my problem. I have rendered an animation from Blender which has given me 101 images that I need to make into a strip. I have tried the 'strip of images' function in Xn View but this requires that I have a background color and I need to keep the alpha channel, the alpha channel is very important for what I am doing with this.

Is there a way that I create a strip of images preserving the alpha channel with Xn View?

I have had no success yet. I have loaded all 101 pngs into a strip by hand in photoshop but this took me hours and it is very frustrating I don't want to have to do this for everything that I am doing. I now there are options like pngstrip but I don’t know how to run that and I would prefer Xn View as I have always had success with it.

Any help is greatly appreciated I am rather desperate at this point.

[Clo]

BASE designs

Hello ! Welcome aboard !

• Well, when creating a strip of images, there is always a BG-colour, and the transparency is not part of the possible choices…

• There could be two workarounds, depending on the colour-depth your images have:

1. If you save the strip as PNG-8 BPP, then you may set a colour of transparency from the Image Menu >> Colour Map
- indeed, set a colour which is NOT used in the motives-

2. Save the strip as PNG-32 BPP, with let's say, a pure white BG. Then, remove it with an external tool able to do so,
that I did for the test image below



- I used GFIE (Freeware) with its “Magic Wand” tool…

- It might be possible to set the Alpha channel directly from XnView, but personally I never succeeded in this…

Kind regards,
Claude
Clo

[BASE designs]

Thank you for the reply. I just learned that PNG sticth does just what I need it to do. However when I went to convert that png file to a TGA as I have done on my older version it no longer had the alpha channel when I loaded into the program that I use these in.

What changed?

[Clo]

BASE designs

Again…

• The Alpha channel is not copied during a Copy¦Paste operation, I assume it's the same when converting…
- I just tested that here again with the 1.93.6 RC, same issue (plus a broken image here,
another problem I reported in the French forum, and hard to reproduce, it seems…)

KR
Claude
Clo

[BASE designs]

Thanks Clo.

I am going to use the older version for now. I was very happy with it for the most part.

None the less this program has been a big help over the last year, made some things much easier then Photoshop