How to Reset the ue4 console values to default

I changed some Values in the Console,
(all related to r.VolumetricFog) ,
and now i cannot set them back to their default settings, as i do not know all settings i changed but i got huge performance issues now…

I want to know if there is any command or way to set all the console values back to their default values.
thanks in advance!

I’m wondering the same. Did you find a solution?