Whoops, I meant to reply to this a while back, but forgot to head back to this thread. I'm going to leave the Zombieman's rifle alone as changing it to match Doom Guy's gun would be too jarring. Plus, although they're technically the same, there's no real indication that the two weapons are supposed to be identical. I've been aware of the inconsistencies in the Demon's attack and pain frames, but I'm hesitant to change them as it would basically be all original art modifications on my end. I don't think the darker claws would be too difficult to match, but the orange markings on his legs are trickier. I'd like to just copy the orange things from its existing walking frames, but I'm not certain if the leg positions match closely enough.
Anyhow, I have a few thoughts on potential "fixes".
The slight proportion alterations evident when comparing the Zombieman/Shotgun Guy sprites and Doom Guy's sprites are intriguing, though. I'm most interested in these changes as they have a clear technical basis to work from. It might be a bit presumptuous to assume the former humans should have identical proportions to Doom Guy, but I'll make the changes myself and scrutinize the end results. Just to be clear, however, there are no impending updates to this project coming soon. I still wish to attend to the Heretic and Hexen fixes first, and I'm backlogged with many other things in the mean time.
But for the record, I am keeping a very close watch on the potential Doom beta now in the hands of those at the Duke4 forums. If that manages to see the light of day and there are new useable graphics to be found, that will prompt an immediate and critical update here. Fingers crossed!
As Werecat said, it appears you uploaded the wrong WAD as I don't see any differences, but judging by your description, I don't agree with the changes you've made as they're certainly not errors to be fixed. Quite the opposite, I believe they're very deliberate artistic choices meant to add some subtle color depth, an important factor when working with a limited color palette. I've seen other sprite modifications remove the green/brown highlights from the weapon sprites, and I think that erases all of the depth and color detail, resulting in flat, monochrome shapes.
I really like this mod. It makes Doom much more cleaner and better. So I decide to mod it. Here's a list on what I've done;