Just what does this "Hint" supposed to mean? "Don't try to use a standard physic material for the main character. Make a customized one and get it perfect."(source: the docs)
Does this mean that for a character moved via forces one shouldn't use Physic Materials but..what?..custom scripts holding special attributes for the surface and add forces/counterforces to the character based on these? {confused:/}
This hint is pretty strange.
I believe this means exactly what it says despite how awkwardly it was put.
Don't try to use a standard physic material for the main character. Make a customized one and get it perfect.
likely means
You shouldn't use a pre-packaged physic material for the main character. Make a customized physic material and get it perfect.
The standard physic materials they are likely referring to are the ones that come packaged with Unity - there aren't many of them and they aren't perfect for every use. In most cases you shouldn't use the standard physic materials for your character.
They are suggesting that you create a physic material for your character and customize it to get it perfect.