How to Apply a Texture Over Another Texture?

Hello, I have a weapon with It's own textures, and now I want to add an logo like image on it as a customization, so I don't want to apply a new texture to it, instead, I want just to add another colormap, this one will only hale the logo in the right position following the objects' UV mapping, and all the rest will be transparent, in other words, I just want this texture to be like an adesive to the standard one? Does someone know how to do it?

Thanks;
Arthur

 

Hi,

did you try to use a decal system ?
https://www.assetstore.unity3d.com/en/#!/content/13889

all the best,
L.

 

Thanks