The anti-aliasing mode SMAA 2TX causes an annoying flickering near fires, fireplaces, sometimes torches of other persons in the night and sometimes also on smoke coming out of chimneys. With 1TX the flickering is gone.
Anyone might have a solution? 
Wow, thanks for the input, gerardfraser.
But which of all those commands might prevent the flickering near fires? 
Anyway to get good antialising without blur while moving? smaa1x is not enough and 2tx causes that horrible blur. Why there is no smaa2x option? What is difference between r_sharpening and r_AntialiasingTAASharpening?
I don’t know… I still have this flickering bug with 2TX. I constantly update the Nvidia drivers but it seems pointless.
Only happens with fires (at pots, torches, chimneys etc.)…
Flickering is a well-known problem of SMAA 2TX in general! 
I guess there is nothing you can really do against this issue…
So you’re saying I am lucky I got this bug only at fireplaces…