The question is simple. I tried the sh3 config utility, searched on google and sh wiki but no luck? Do you have any idea?
Please note that I'm playing the original, not the HD version.
From the game's Options menu, you need to go to the Extra Options Menu where you can turn the noise/grain filter off. On the PS2, you did this with the L1 button as described here. On PC, I'm not sure what button it is, but since the PS2 uses L1 and R1 to turn and the PC version uses Q and E to turn, I would try hitting the Q or E buttons from the Options menu to see if you can access the Extra Options.