We are trying to add functionality in our iOS AR apps where our users can directly import textured 3D models (using .obj files for the 3D model and .mtl files for the textures). The iOS import feature only gives us the ability to import one file into a scene in our app. However, we need to directly import many files at once (.obj and related .mtl files all in one scene). Can anyone give us guidance on how to allow for the import multiple files at once into directly into an iOS app? Thanks so much!

Hi all, Does anyone have familiarity with Metal 2 on Mac? We are working on a 3D rendering tool on Mac and are having major issues testing on older Macbooks using Metal's Performance Shaders (Macbook Pros Mid 2012 and 2015 running macOS 10.15) and newer MacBook Airs using Metal's Performance Shaders (Macbook Airs early 2015 running macOS 10.15). When testing rendering using examples from Apple or derived from Apple examples, the screens appear red on older MacBook Pros and black on Mac Book Airs. We have no issues testing on later model Macbooks or on iPads. We would appreciate any guidance to help us resolve this. It has held us up for months in testing with no resolution yet. Thanks so much and Happy New Year!