You can adjust depth and scale the same time - e.g. when using:
depth=1000 + scale=1
depth=500 + scale=0.5
depth=2000 + scale=2
depth=4000 + scale=4
the hotspot will always have the same size.That means when the hotspot is farther away, it would need to be scaled more to get the same size.
Thank you Klaus for explanation.
I did not find information about the loadpanoscene() function in the example xml code or in the documentation.
Piotr