This is general question. I have been editing some family and music video movies but never entered the 'FX after area'.
I come from 2d graphic design background and every graphic designer knows or should know that opening and saving JPG file repeatedly lowers the quality as this applies copression on top of already compressed file thus downgrading the source material every single time.
When I started hearing about After Effects, Hitfilm etc. I was surprised there is a separate software that applies special effects or even titles I believe separatelly to the main editing/cutting project.
Can someone explain briefly how does the process looks like and does it not affect the quality to render the movie from one software and then open and render it again from another program.