[FEATURE REQUEST] Add Mask to Shadow-SDF

[CrossKun]

Hello Lil team!
Thank you for the Shadow-SDF Update! It helps me a lot!
Is it possible to get a Mask for the SDF? (For Example: Another texture or transparency effecting the power of the SDF Texture to use the power of the default shadow-shading (shadow-Strength))

My problem is the following: Face has shadow-SDF, Body has shadow-Strength
Because of this, the shadow between those two body parts break.

If this is not possible or too troublesome, you can close this request.

Thank you for your great work!