My screenshot was specific in that it included a white background. That's why I was trying to imply it wont work in only specific cases.
I saw, and that's why I avoided to quote my last SS (black background ^^).
Anyway, you made me doubt about a white fanart. So I made a lil' test. Installed one of the previous patch (the one that allow me to get ride of the 2nd overlay). If you are interested, here the result:
Original picture (no overlay, white=255,255,255, so i can't get more white

)

With the overlay (i can't go under an opacity of 0.40 with this patch)

And finally with the last patch (opacity 0.40):

No need to tell me wich one you prefer^^
And I'll don't argue anymore too!
Just wanted to show those pictures, so everyone can make his own opinion.
And like you said, anyway, it's up to Steven
