Multithreading Filament

[nimrod-gileadi]

Is there some documentation on what multithreading approaches are supported by Filament, if any?

I'm trying to do parallel rendering into offscreen buffers and I assumed that I could create a separate Engine instance per thread, load the assets separately in each thread, and make render calls on each thread.

So far I found two pieces of documentation:

1. This discussion, but can't tell if the advice is to always interact with an Engine instance from one thread, or really to only have one instance of Engine in a process?
2. The comments in Engine.h, which state that Engine is not thread safe, but I read them to mean that separate Engine instances may be used concurrently.

When I tried to do this in practice, I ran into issues with asset loading, and driver loading. Am I trying to do something impossible? Should I be multi-processing instead? Should I be filing bugs for issues I found with multithreading this way?