1. If all the nodes in the saved node tree are aviliable in the current blender version, it will be loaded successfully. The connection of the socket will be restored. If the node interface changed, the addon can automatically adapt to the new interface when restoring the connection.

2. If some nodes in the saved node tree are not aviliable in the current blender version, the loading process will failed and you might see an error message.

3. For Mix node added in Blender3.4, if you load it into Blender3.3, the addon create an nodeGroup which has the same functionality for you to take the position of it.

Yes, we support LuxCoreRender, Octane render and any render engine that uses standard node.