Nevermind, I can’t believe how stupid the correction was.
I added the res folder to the main project folder, not to bin, and then went into eclipse
run> run configurations> classpath> select user entries> advanced> add folders> select res
then when I called the folder from res, instead of doing "/res/gfx/entity/entity1.png", I did "/gfx/entity/entity1.png"
!