I am developing a game (or a game engine) that includes a low-poly human-like character model that follows the same proportions as Minecraft's Steve character model. Specifically, the model consists of 6 cuboids for the head, torso, arms, and legs.
I would like to make my character model compatible with the community skins available for Minecraft's Steve by following the same dimensions for the body parts. However, I would not use any copyrighted assets from Minecraft or Mojang Studios, and my character model would have a different default skin. The texture applied to my character model is separate. It is intended to be compatible with the skin format used in Minecraft so that players who have customized their skins in Minecraft can import and use them in my software program.
The exact proportions of the body parts of Minecraft's Steve are the following:
Head: 8 pixels x 8 pixels x 8 pixels Torso: 8 pixels x 12 pixels x 4 pixels Arms: 4 pixels x 12 pixels x 4 pixels (each arm) Legs: 4 pixels x 12 pixels x 4 pixels (each leg) The low-poly aspect is important in 3D graphics as it reduces the number of polygons needed to render a model, making it less computationally intensive, and the proportions in Minecraft's Steve character are intentionally simple to maintain this efficiency.
My software is a game (or game engine) that does not resemble Minecraft at all, I just want to use similar human-like characters. Quite possibly my game and its assets will be published as Open Source software.
My question is: Is it legal for me to use the exact same proportions as Minecraft's Steve character model for my low-poly human-like character model in order to support texture compatibility with community skins, even if I am not using any copyrighted assets from Minecraft, or Mojang Studios? Are the proportions of a low-poly human-like character model, consisting of 6 cuboids for the head, torso, arms, and legs, copyrightable?