3D Media Recommendations

The 3D Media Recommendations are a set of guidelines indendet to facilitate the use and interchange of 3D Media in applications and games. Specifically, they're intended for games which use a human scale of things, such as roleplaying games or first-person shooters.

Recommendations:

1 3D unit is equivalent to 1 meter.
The coordinate system is right-handed.
The coordinate system is screen-centric (picture your screen: the x points right, the y points up and the z points towards you).
All rotations are defined using quaternions.
All faces should have 3 vertices (i.e. the model has to be composed of triangles).
Humanoid skeletal animation should conform to H-anim, specifically, humanoid bones should conform to this diagram.

(Insert cute drawing here for reference)

Rationale

1 3D unit is equivalent to 1 meter

If everyone agrees on using the same equivalence between 3D units and game units, we get rid of scale problems, and all our models will look good together. 1 unit = 1 meter is the simplest conversion.

Standard humanoid skeleton

By using an standard humanoid skeleton we can reuse every animation for every character. H-anim has already done the work of defining a neat skeleton, and determining subsets for applications that don't need all the possible human bones.