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I don't think it would look good.
Yes. The hand models will be replaced at some point. I was thinking about the Zombiemen's Rifle, The Rifle from Doom Alpha and maybe a Flamethrower. But the mod is faaar from done.
At this moment most of the content you (will) see for some time it's basically just old stuff, being finally implemented in-game/playable.
I'm trying to gather a small team to work properly on the mod to get it done.
Don't really think. As you said Doom Rebron it's an 1:1 recreation. Same design from original DOOM. While this version tries to bring realistic visuals to the levels. Similar to Classic Doom 3 mod. Tho I would like to collaborate with them.
Melee attacks are planned. Cover fire not. Fast-paced leaning like in RTCW is planned. More gore and maybe gibs. Yeah
Beretta I think looks fine, but the Shotgun could use more details.
Still, I'm not thinking them to be futuristic guns. But a blend of both. Kind of hard to explain tho.