Beautiful! I could be totally off base but I believe the depth feeling comes from the fact that you are seeing some of the photosphere showing through below the chromosphere. I know everyone feels a double stack gives better contrast but I have always loved the feel of SS images on surface features that allows you to actually see the chromosphere floating above the photosphere. So you really are looking at different levels of the suns atmosphere and that is where some of that depth comes from. Also, this type of resolution bringing these features so close shows the subtle differences in height between the filaments, spicules, and other features of the chromosphere.
Notice the penumbra of the Spot shows through well and with a DS setup that typically is not visible since that is a photosphere structure.
Edited by rigel123, 03 December 2020 - 06:47 AM.