so out of all of these heads besides a couple of them there is ONE main idea and then the supporting art is just enforcing the main idea. u add a couple 1-3 small details that build up the main idea to make it better but not take away from it.
This is extremely noticeable with co-lab heads where there are multiple people adding their own small details. then the whole head becomes small details and then basically you don't even have a head anymore. just a ground texture.
For example your 3 mouth heads where its "horror" or something. the first lighter colored one was a mouth as the main subject. Couple of scars as your small detail and then a brain in the back that imo could have been exicuted better but its ok.
Next your wip. I'd say that one is actually better than the one below it with all the lines running around. where am i supposed to look? on the wip i see eyes and teeth. k the eyes are white its kinda scary or whatever, and teeth, cool. maybe one or two small things to add. (and fix whatever is going on with the ears.) but the bottom head with all the lines where am i looking? I tend to look up his nose to that thing going up his forehead or else his teeth with the huge gums. how is a thing going up someone's forehead or teeth with gums scary??
Now lets go to jebus head with the wood on the back (that actually imo should be removed and 10x better.) We got white eyes (draw attention) white teeth (draws attention) and some scars and beard to support it. easy its done, stop adding useless details, just flesh out the existing ones.
idk WHY you like that head of mine its actually a FAIL and shoulda been a lot better but i gave up half way through. only reason why its public is because i was wearing it and someone wanted to buy it.
all my heads that i chose to like are because there is something in them that is really well done technically. ie. mrootz hair, vitek hair, jebus skin/expression, clockwork shading, piff mapping/lighting.
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As yumi said Robot heads get boring with only two colors, but sometimes when the shading is done right and there's multiple forms of depth the head can turn out perfect
Will you make up your mind? Are you saying if your not good then fill it with random windows and wires and lights and stuff to fill up space?
Rather than just "shade with multiple forms of depth" and two colors and it's perfect.
Why not just start with aiming for perfection.
Or how about show me a good robot head with lots of little details.