In this video we will have look at another simple way to set up your aov's for grading. I call this setup the "simple subtractive method." We will again start by looking at a flawed setup to be analyzed. Then, we will walk through a fixed setup, ready for production. I will also go through what makes this setup method different from the additive method, as well as some pros and cons.

Timestamps:
00:00:00 Chapter 1 - Start - presenting setup
00:00:59 Chapter 2 - start the walkthrough of the setup
00:01:18 Chapter 3 - unpremult in the correct place
00:01:59 Chapter 4 - keeping only the relevant passes in the data streams
00:03:08 Chapter 5 - explanation of the subtractive method
00:05:03 Chapter 6 - benefits to the simple subtractive method - potentially very small and efficient setups
00:06:16 Chapter 7 - benefit - the ability to grade across aov sets
00:07:54 Chapter 8 - possible cons - risk of inconsistent layout
00:10:10 Chapter 9 - tradeoff - option to set things up like in the additive setup
00:11:25 Chapter 10 - looking at the flaws of the original setup
00:11:48 Chapter 11 - issue with masked merge nodes
00:14:58 Chapter 12 - premult node issue
00:16:04 Chapter 13 - space for grading not optimal
00:16:43 Chapter 14 - first look at fixed setup
00:17:17 Chapter 15 - first fix - no masks on merge nodes
00:18:06 Chapter 16 - second fix - premultiplication fix
00:18:24 Chapter 17 - third fix - better layout for equal space for grading
00:19:54 Chapter 18 - setup created for an entire aov set
00:23:27 Chapter 19 - discussing how to keep benefits from both additive and subtractive methods
00:25:04 Chapter 20 - outro

#compositing #vfx #nuke