HDRP Detail Map Creation help

Hi, I'm attempting to learn how to create Detail Maps. I can't seem to find anything in the manual relating to HDRP, but did find a post here that outlined what each channel is used for.

Can anyone point to a tutorial or in depth explanation of how to use this map / how to set it up in PS?

 

https://docs.unity3d.com/Packages/c...ition@7.1/manual/Mask-Map-and-Detail-Map.html

It's been few months since I used them, but I think in MaskMap B-channel you would put your custom mask which defines where the DetailMap should appear (white is full detail, black no detail). You can leave the B-channel completely white, and your DetailMap will appear all over the surface (sometimes you might want this, sometimes not).

 

Thanks Razo84, somehow I could not find that page. That explains it perfectly.