Channel packing plugin for Godot Engine 3.x
This tool allows you to pick several textures and pack their channels into a single texture. This very useful to pack albedo with roughness, or normals with bump into the same texture for example, which helps shader optimization.
This is a regular editor plugin.
Copy the contents of
addons/zylann.channel_packer into the same folder in your project, and activate it in your project settings.