James

A relatively simple search of the repository yields your answers: 1. He wrote the [Collada](https://github.com/the3deers/android-3D-model-viewer/blob/9537b567ca661d1a5cd27b06164bb38b6124830a/engine/src/main/java/org/andresoviedo/android_3d_model_engine/services/collada/ColladaLoader.java) (.dae) loader himself. 2. It's written in Java, so you can probably use it for...

When debugging, always check the top first. This one seems pretty simple - your phone ran out of memory. Try reducing model complexity.

Perhaps you need to think about the issue differently. I don't know your use case, but generally when people want to render multiple 3D models they're doing video or game...