Font effect in UMG

Hello,

I am trying to make some blur effects on a text on UMG (so no distance field).
I think about using a font material, so I created a custom material and set the material domain to User Interface.

From here, I don’t know how I can get other pixel datas required to make my blur (since there is no TextureSampler from which I can take the pixel datas of neighboors).

Is there a special node to get theses informations ?
If it my approach is not correct, what should I do ?

Thank you !

Font effects sure would be a nice thingy for Unreal Engine