MeshNormalSmooth() takes a vertex and iterates all the others, looking for vertices with a distance < epsilon.
Then it calculates their normals and sums it.

That's not a good idea, IMO:

• Two close vertices can be not physically linked, I don't think summing normals makes sense.
• It's quadratic.

A simpler and faster way to smooth a model could be:

• Iterating through each triangle

There are a lot of examples for Raylib that can be ported to Rayfork.

This can also help with testing the library for bugs so working on this is very important.

Discussion on the state of documentation for this library.

Code comments.

Using the same comments for most of it with the same style as raylib. One idea is to change them to xmldoc style comments which can be used to generate external documentation. Unsure if this should be done but worth looking into.

Tech notes

Adding more details here to make it easier for people new to raylib