CG Compositing Series – 2.3 Material AOVs – Direct, Indirect, & SSS
In this video I cover the intermediate level of CG recombine, which is Direct and Indirect Passes, as well as SubSurface Scattering.
I go over what direct and indirect passes are and how they are rendered, and why they are important. We learn how to identify them in different render engines and naming conventions. I also cover 3 ways a Compositor will typically use Direct / Indirect render passes in every day compositing.
I also breakdown a technique known as Motion Vector Denoising, which helps reduce noisy CG renders while maintaining details.
Please head over to my blog post to get the full read through, as well as links, project files, downloads, credits, resources, etc.
https://compositingmentor.com/2023/12…
Here are some important links:
Josh’s Channel – How Ray Tracing (Modern CGI) Works And How To Do It 600x Faster
• How Ray Tracing (Modern CGI) Works An…
VectorMedian
https://www.nukepedia.com/gizmos/filt…
DeflickerVelocity
https://www.nukepedia.com/gizmos/time…
Special Thanks to Valentin Nicolini for the Cornell Box render
Timestamps:
00:00 – intro / recap
00:48 – What is Direct Lighting?
01:39 – What is Indirect Lighting?
03:38 – Raytracing
05:05 – Global Illumination
05:42 – Raytracing Josh’s Channel Clip
07:40 – Real-Time Raytracing, RTX graphics
08:34 – Ways to Reassemble Passes
09:34 – Identifying Direct & Indirect Passes
10:08 – Redshift: Naming Conventions
15:38 – Redshift: Recombining Direct & Indirect
17:33 – Grading Direct / Indirect Separately
19:40 – Arnold: Naming Conventions
23:07 – Arnold: Recombining Direct & Indirect
24:06 – Octane: Naming Conventions
26:38 – Additional Foundry Render Examples
28:24 – VRay Naming Conventions
31:00 – Recap Identifying Direct / Indirect
32:09 – How to use Direct / Indirect in Compositing?
32:35 – 1. Contrast and Colour Correction
39:30 – 2. Filters and FX
42:49 – 3. Denoising CG
44:04 – Identifying Noisy Render Passes
48:19 – Nuke Denoise
49:48 – Neat Video Denoise Plugin
50:49 – Motion Vector Denoise Technique
1:01:35 – VectorMedian
1:01:51 – DeflickerVelocity
1:03:17 – Recap Outro