How to render a 3D player model

[sinful goblet]

Hi, I'm trying to download a 2D skin from NameMC, then render intro a skin as a 3D model, I know how to download it but I don't know how to render it in 3D.

I have this code just for downloading the skin:

https://pastebin.com/L3AdTvwr

[trail talon]

See https://github.com/IMB11/SkinShuffle/blob/master/src/main/java/com/mineblock11/skinshuffle/client/gui/cursed/GuiEntityRenderer.java for an example