Channelizer

Channelizer is a tool that lets you view, swap, split, and merge an image's colour channels.

It can be useful when working with game textures that store data other than colour information in an image's channels, for example Unity's PBR material expects the Smoothness map to be stored in the alpha channel of the Metalness map. Not many programs besides Photoshop (which is expensive) provide a way to do this. With Channelizer you can choose to put any image in any channel and merge the result into a single TGA file.

Channelizer also lets you convert a PNG with embedded alpha into a TGA with a separate true alpha channel and not even Photoshop lets you do that.

You can also export the four channels as separate images for use in other programs, or just convert an image to a TGA.

Currently Channelizer can only open JPGs, PNGs, and TGAs and can only save to TGAs.

Channelizer is free for use on any project, commercial or otherwise.

Change Log

1.02: Can now batch convert a large number of files to TGA at once.