Unit Atlas 'white marks' Issue

[Malcolm]

Hi everyone,

having a problem with atlas files. I'll walk you through the workflow:

1. I export an atlas file to mod. Let's say I am adding a new kilt to the atlas.

This is how it looks in photoshop:

Spoiler Alert, click show to read: 

I then save the atlas.dds, and open up PFM to check on it but in PFM it looks like this:

Spoiler Alert, click show to read: 

As you can see there are white marks - leftover from the unitpart that was there before.

Any idea how to get rid of these? Otherwise I have to use loads of atlas files cause I can only insert about 4 hats/large atlas.

I'd really appreciate the help - this has bothered me for years and haven't seen anyone else complain about it

[Primergy]

Check the alpha channel, maybe there is a leftover.

[Malcolm]

Check the alpha channel, maybe there is a leftover.

Thanks for the quick response, Primergy. You nailed it! I can't believe I spent so much time on this, thanks!

[Sirlion]

I never use Photoshop for DXT1 work. Paint.Net doesnt cause artifacts on its default settings when you save to dds.

[Steph]

Gimp works well too

[Malcolm]

Thanks for all the advice! Going to stick with photoshop for now though.