For more detail this asset from the Unity Asset Store: Click Here
This is a paid asset, but now you can download Channel Packer for FREE, Please keep in mind this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Channel Packer
“If possible, please buy the package to support the developer”
Why use Channel Packer:
Channel Packer allows you to pack up to 4 different images in one texture, to manage and process them at the same time, saving memory.
Channel Packer works in two different ways:
– Single mode: used to generate a single texture, packing up to 4 input images;
– Batch mode: used to generate many textures in a unique operation, starting from a list of images; it allows to associate them to the needed channels and pack them in a texture for each association.
Further options:
You can invert images, use colors, select channels to use, and more.
It does NOT require Unity Pro
Read the full documentation.
Official forum thread
