Never get any posts but whatever.

sorry, it looks cool but dk much about smudging or GFX to begin with

I like the tags , but it's not really a tutorial , more of an introduction

Im glad you've put that flow stuff i reminded you about before, its an important point when you make smudged bgs,

agree with SD, it's more like an intro (i like it though)
But here is the part which you shall extend to make it a real tutorial: look at the part when you show us "smudging can be used to make such swirls"
You say: what did i do to make these, but there is something missing - i can see a difference in the 2 brushes above and your result, those 2 brushes have kind of a fade effect, and yours is only white, if you could show how to do that fading it would be great
Also the part of coloring the black-white-gray smudged bg - explain it in detail
Do these 2 things and itll look like a real tutorial
And just 1 more tip in general, a sig doesnt have to be landscape, you can make it vertical too, sometimes the renders you use request that to have your sig look good.