These guidelines are not related to Needle Engine specifically, they’re the same for any engine / system, the limit is the hardware not the engine. Lots of information out there, but in the end, please test on the lowest-end device that you want to support 
sure thanks loving it now
by user 546555823451668481
Great to hear! I’ll mark this post as answered. If you can repro this kind of missing/black materials in the future feel free to let us know here!