Back at it,
Blendit_Josiah, wow your render is awesome !
I followed your advice and turned the katana upside down (didn’t scaled up the support though ^^’ )
I already had a rim light, but I gave it more importance and reduced other light sources.
OLG, I wasn’t using it because it gave me pretty bad results on another project, but I gave it another try and you were right, it’s way better. I chose an HDRI image with warm red and yellow colors, so it didn’t feel out of touch. (here, it’s the one named "Popcorn Lobby if you are curious, 2nd column, 9th row)
omgold, for the node material, I think I kinda fell in the trap “the more complicated, the better it will look” (which isn’t true), and what you say regarding the scratches is totally true so I tuned them down (couldn’t resolve to erase them totally ^^’ ) and i edited the hamon texture so I had more variations.
I’m a little bit uncertain about the blade now, doesn’t it look a bit too “glassy” ? I can’t get it to look more “metallic”.