Hi. There are a lot of people who have asked me for an update on the series (Part 1 was launched in 2019) and we have a lot of awesome new tools in Blender 2.9x. Indeed it's a necessity to upgrade part 1 to 2021, including some new methods in the GBFVS shader.
Stay tuned, because as supporting Patreon, you'll get it first. I can't promise it will be a reward for February, but it is now scheduled to be a reward nevertheless.
Let me know what you think. ๐