January 2021 Issue!!
The utilization of masks in PixInsight is a primary processing technique - especially with regards to multi-scale processing to characterize features in the imagery data.
These lessons are vital and interwoven into almost all processing tasks in PixInsight... (So take note!)
Most of these videos were published in 2019... but the concepts are all still valid in 2022 (nothing about masks has really changed much).