(2019-06-06, 4:38)Matt Chambers Wrote: Does this mean that parts that are exclusive to other brands could be added? Like these parts from Cobi:Sorry, no... See https://forums.ldraw.org/thread-21841-po...l#pid23483
They're compatible with Lego in terms of size, and the SNOT pieces provide flexibility Lego currently doesn't have.
Now this kind of parts are very easy to model and of course nothing prevents you to add them to your own private library!