Hello @atteneder ,

it would be great to get notified whenever an gltf-file is loaded, which has an extras property in one of its node objects. Maybe fire an event when that happens and pass a reference to the corresponding unity gameobject/node and the extras data as json-string. Another way could be to create a monobehaviour and attach it to the gameobject and pass the json-string in there. Af

Describe the bug
Images don't get deleted on deleting marker. Only the Uri gets deleted but not the actual image in the disk thus leading to duplicates and waste of space.

To Reproduce
Steps to reproduce the behavior:

1. Add drawing
2. Delete drawing
   or
3. Add Marker with images
4. Delete marker.

Expected behavior
On deletion of drawing > All drawing image and all nested