If one is familiar with the meditative system of visual holograms produced by tigle as per the Dzogchen lineage, the description shown here, where tigle is described as being productive of various impure cognitive aspects of grasping to true exsitance in terms of the Prasangkika (sgra-spyi etc.) is very interesting. The way in which tigle is interpreted and assimilated with this kind of philosophical positioning and their transforation at the level of path and result as devoid form (tong gzugs), indestructible sound (gzhom med kyi grad), non conceptual awareness and unchanging blissfull awareness culminating in the eventual 4 bodies of a Buddha (sprul-sku, longs-spyod rdzoks pai sku, ye-she chos sku and ngo wo nyid sku) which are particular to the Gelug system seems to demonstrate that there are a wide variety of approaches to these terms and practices. I am curious how interpretations have changed over time and how the various Tibetan Buddhist schools each approach the Kālacakra tantra.