I want my Minecraft skin's head to be transparent entirely. If I try this with a skin editor, it shows as black in multiplayer. Is there any way of doing this?
You can't make it invisible to my knowledge, however you can say, make it blend in with nighttime, and only go out after dark, or you can make it blend in with stone, and always stay underground. So other than camouflage you really can't be totally invisible, I'm not sure if the whole blackness thing was intentional at first, but after multiplayer was first implemented (Way back in...Creative, or Survival Test, I think), is probably when Notch made it an actual feature.
I made all my skins with photoshop, where it's pretty easy because TIFF saves information about "transparency" diffrent to many other formats that just fill in white once you save the file... on photoshop you can just simply erase the area and save as TIFF... (transparency is shown with the grey/white sqares in the background layer)
EDIT: ok I just checked my skins and its PNG! this will save your transparency information and just to show you how it looks I made an image of my enderman skin... if you want to get rid of the head... simply delete it... ^^