How to convert pngs with premultiplied alpha in Photoshop

Unity Engine
1

I’ve got some splatmap pngs which apparently have premultiplied alpha. Photoshop preserves that, so they’re very hard to read/edit. I’ve looked for plugins and methods to convert them to “normal” but no luck so far. Can anyone advise me on how to do that?

thanks!

2

superPNG read/writes alpha as expected, default (or iirc hold alt while open) popup allows you to extract RGB onto transparent layer using an alpha channel
4820096--462059--upload_2019-8-4_3-2-46.png

you can also cntrl+click an alpha channel to make a selection copy RGB off background to save as a transparent layer… but you’ll need to re-accentuate color on soft edging
4820096--462062--upload_2019-8-4_3-4-43.png

3

Thanks! I had been trying with SuperPNG but couldn’t get it to do anything. Finally managed to Alt-Double Click on the file to open that dialog, and now it works.

4

In photoshop… On the top menu under layer, layer mask, there is an option like ‘mask from layer’ something like that which will move the alpha into a mask on the layer which you can then move to an alpha channel. On my phone or I’d be more specific.