I do not have Photoshop installed on my own local machine unfortunately, but would like to know if Photoshop can export an image file to a PNG and retain the separate layers for a different program such as Paint.net?
Like marcusdoesstuff says, one option would be to save out your file in a
Another option would be to save it in a
PSD format and use a plugin to open the PSD in Paint.NET. One is available here, although I can't speak to how well it works as I do not have Paint.NET to test it.
TIFF is a widely supported image format that can save layers and transparency (which Photoshop can open). There's not a ton of advantages of using PNGs over TIFF unless you're using them on a website. Whether it works with Paint.net or not, I'm not sure, but you could give it a go! You could also try saving as PSD (Photoshop's native format) which work with some other software but they may need plugins to work.