@professionalbigot69 @PurpCat @Nudhul speaking of interpolation, I found the article I think https://kinematicsoup.com/news/2016/8/9/rrypp5tkubynjwxhxjzd42s3o034o8

It's complicated but basically a lot of games run physics and motion at a rate that is different from your monitor. There are very good reasons for this (when was the last time you fell through the floor in a game?), but one of the issues is that it can make objects appear jittery unless you have very high fps.

The fix for this is called temporal antialias (not the one everyone is complaining about recently) but almost nobody does this because it's a shit load of work.