Known issue with C3 project folders

There is a known issue with using project folders and 'export as folders' project settings. I think the C3 SDK has a bug between editor usage of folders and runtime usage of folders. For now I recommend to _not_ use subfolders for gltf/glb files until this is corrected.

Here is my bug report to Scirra:

https://github.com/Scirra/Construct-3-bugs/issues/6413