ALT Mask is Grey, Not Black

[sandytdavis]

When using Alt Mask in Photoshop, it defaults to grey, not black.  Any ideas on fixing or why this is occuring? 

[Ged_Traynor]

@sandytdavis can you post a screenshot of the Photoshop interface with all the pertinent panels opened

[sandytdavis]

I am attempting to do a dispersion photograph. As you can see, the Alt
Mask is grey.
[image: Screenshot (2).png]

[Trevor.Dennis]

I am attempting to do a dispersion photograph. As you can see, the AltMask is grey.[image: Screenshot (2).png]
By sandytdavis

@sandytdavis Your image didn't make it. Use the forum widget at the top of the post.