Hi, in the editor there is the possibility for the material editor with "channel = X" to filter the images.

Mall wanted to ask if it still works because it doesn't work for me or I'm doing something wrong.

MyImageName"?channel=a"
or
MyImageName?channel=a

Since I use assets from unity, the shmoothnes is in the alpha channel that I would like to filter out.

yes it works 100%
this is the correct form:
MyImageName?channel=a
remember to include full path and extension too:
c:/image.png?channel=a

Thanks, my mistake had entered the name somewhere else.

Tip for others you have to add and reload with the reloader.