The Strands asset provides the XFur Studio shaders with information about the shape and distribution of the strands that will form the fur of the character / model. These strands are stored in a texture’s red and green channels, and for convenience, they can be procedurally generated through the Strands Asset itself or, if special shapes or additional customization is needed, a custom texture can be provided.
The default strands asset provided with XFur Studio™ 3 is procedural, and its first pass controls the red channel while the second pass controls the green channel of the strands texture. In the final XFur Studio shaders the red and green strands are used to provide color variation in the fur (the additional blue and alpha channels are reserved for future upgrades so in custom textures you should leave them empty).
If you do not want any color variation in the strands you can use the parameters to generate only red or only green strands. Furthermore, this procedural texture can be exported for further editing.