While drawing I noticed that after applying some filters and modifying with selection an edge popped up along many lines. How do I avoid or fix it?
Edit: found a solution! Instead of having the semi-transparent blue layer above the lines, selecting the lines and bucket erasing, simply move the layer below the lines and, if you've already made my mistake, color In the weird edges. Stupid problems require stupid solutions I guess
I don't think you're giving enough information for a proper solution.
I'm not very familiar with Krita per se, but this could be an artifact left by a sharpening filter, or more likely a result of a paint bucket or magic wand selection. Those dont do well with edges that have blended with the underlying color.
All of these can be avoided by using different layers for these overlapping elements.
I figured out a fix in the end. It was pretty much exactly what you described. (ps, since it's kind of a stupid question should I delete the post?)
Typically keeping old posts and updating them with solutions (if it's a question/request) is encouraged:
Glad you fixed it! As for deleting the post.. *shrug*
From what I gather, deleting a post on the fediverse is still quasi-impossible :)