Fading Materials on Mesh

I’m trying to achieve a fade of a material in which makes my character go translucent/opaque similar to Halo’s “Active Camo” where the player is very opaque, almost invisible.

I have the material I need so far and this is how my player looks, I just want to have it gradually fade in to look smooth.

Managed to solve my own issue slightly in terms of fading out a material using “Set Scalar Param” on a masked material I made following a video tutorial:

In case anyone needs it..