Good evening everyone,
I ask myself this question for a few years already, without finding a logical answer.
I noticed that the AM export Obj writes the triangles like quads.
That is to say for a triangle ABC, the convention is to write as follows: f A B C
But AM write them: f A B C A, which is the convention of writing quads (f A B C D).
Some programs like Wings3D play them correctly, others like Blender, consider them as bad quads that they ignore, which creates holes and therefore unusable.
I thought this was because the three-sided patches are a variant of the four-sided patches, but I do not understand the usefulness of keeping this writing export that makes it heavier files and that do not make them compatible with any programs.
But seeing changes this done during the past years on the export plugin of obj, without this triangle writing being changed; I tell myself that there is something that I do not know or that I do not see, hence my question: why write triangles as quads?
Thanks in advance for those who will be able to show me the benefits of writing these triangles as well.