Hello,
I exported my base color from substance, i tried several preset but it's always the same result, for exemple i have freckles on the skin and even in photoshop it looks faded
screen of the base color only in substance

and screen from photoshop

i tried 8 bit or 16 bit, i tried to put a adjust gamma node in maya at 2.2 (found this on the substance doc) but nothing seems working... if someone has an idea please