3D noise mask export as bitmap, how?

[mantasdm 0]

Hello,

So I have this animated noise mask going through the geo (geo is uv unwrapped). Now how do I bake it/export it as a 2D greyscale image sequence, which I can later use it in another DCC as an opacity mask?
https://i.imgur.com/8RBAxOn.jpg
Another related question - how do I use this mask as (let's say) an opacity mask in Redshift/Houdini? 

Thank You

Edited July 30 by mantasdm

[smbell 2]

Sidefx labs maps baker is what I usually use. There is also the labs simple baker which will work fine for masks like this as well.