Silly question about Map Switch?

Here is what I did :

- I took a Map Switch.
- I connected the Selector with an Image, choosing our lifesaver.
- Then I put all Sources to transparent.
This way the Map Switch would not show anything, just an empty area.
I wanted to see, precisely what happened connecting only one of the Sources.

I added a Stones ( only black and white colors selection ) to test the Map Switch.
This was the set :

Example 2

Not correctly speaking, is it like every Source represents a range of color?

I.e. the colors that show are those above and below the source you are plugging in. If you plug the stones to source input 8, colors from 7 and 9 are introduced into the mix.

Thanks Skybase, ThreeDee, SpaceRay.

Yes, it is true, changing Source not only to alpha 0%, but also to white or black, there is no other color appearing.
But... new question.
Something must be selected on the source: white, gray, black......
As you can see in my picture, I tried to connect the same Image, the same Blocks component, with two Map Switch.
The settings of the two Map Switch are all the same, except that in the first, after making all the Sources alpha 0% I selected Black and in the second White.
As you can see, the result is completely different.
Then the question is, what should be selected, for having the source using the connected component without changing it?

Quote
Skybase Time to experiment... a lot.

And why we must GUESS, experiment a lot, and try by trial and error, and try to understand a new feature, when FF team could have been able to EXPLAIN how it works and what can be done and how combine it with other components in a good and right way, and how to upgrade the already knowdledge from old bomber to the new bomber+

i think is silly that when releasing a new version of software, user have to Guess how to use it

damn it Threedee said what I wanted to say. lol
So I got rid of this post.

Thanks ThreeDee and Skybase.