Skin Editor is work with original Minecraft skins with a base resolution of 64x64 pixels. This editor has an RGB color palette with the ability to save a.
All i know about 4D skins that you need to code 'em, but how about an In-Game skin editor that could make 4D Skins, think about all the creations they could.
Create a Custom skin (eg. at the Skindex), fill out the name for your Skin, name for your Skin Pack, and a Skin version number then upload your custom skin.