I just tried ATWT 1 versus ATWT 1+3 versus TGVD on an image from last night and ATWT 1+3 won by a hair.
![](http://astrob.in/83225/0/rawthumb/gallery/get.jpg)
Where does Masked Stretch fit into all of this? It seems to help me to use it right after I go non-linear and then I do the ATWT followed by clipping.