In this paper and video tutorial, you will learn everything you have to know to be able to adjust and customize the Iray shaders used by the skins of your figures. At the end of it, you should be able to modify the exact properties which need to be modified, knowing exactly what you do, so that the final look of your rendered figures gets as close as possible to the one you have in your mind.
The paper documentation reviews the key Iray Uber properties necessary for skin shading, respecting the Iray Uber shader groups order, and explains the contribution of these various properties on the final skin look.
The video documentation is organized a bit differently, and is divided in three parts :
– an introduction to PBR shaders and how Iray Uber Base groups of properties correspond to the physical interaction of light with skin
– A second part detailing all the parameters influencing the final skin tone, with a strong focus on transmission and scattering (SSS) effects
– A third part detailing all the many possible ways to modify the glossy look of your figures, explaining how you can act on the properties of Dual Lobe, Glossy, Metallic Flakes and Top Coat to adjust this glossy look.
A pdf summary of the Video files is included so that you can find the information you want easily.
What’s Included and Features
57 Pages Paper Documentation (.PDF)
Summary
Goals And Basic Information
The Iray Uber Base Shader For Skins
List Of Properties
The Base Group Utility
Mixing
Base
From Rough To Gloss
Dual Lobe Specular
Glossy
Conclusion to Set up The Base Layer
The Top Coat Group Utility
A Word About Metallic Flakes
Volume Group : Transmission and Scattering
Understanding Transmission
Understanding Scattering, SSS in Mono Mode
Scattering (SSS) in Chromatic Mode
Conclusion And Possible Methodology
The pdf Summary of the Video Tutorial With Time Codes (.pdf)
SSEssentials Introduction (.mp4, 1920×1080)
Duration 15 Minutes
Goal / Summary
The Key Elements Of A Good Skin REnder
What Is A Shader / A PBR Shader
Iray Uber Useful Groups
Correspondence Between Iray Uber Groups And Physical Phenomena
SSEssentials Skin Tone And Volume Effects (.mp4, 1920×1080)
Duration 1h34
Prepare A “Non Iray Uber” Figure For Iray
Base Color / Diffuse Overlay
Translucency / Base Color Effect / SSS Reflectance Tint
SSS Reflectance Tint
Transmission And Translucency Color
Transmitted Color Evolution And Transmitted Measurement Distance
Scattering / SSS Introduction
SSS Direction
Scattering Measurement Distance Influence
Chromatic Mode Of SSS
Examples
The Gamma Of Image Maps
SSEssentials Skin Gloss and Bump (.mp4, 1920×1080)
Duration 2h05
Introduction
The PBR Models
Glossiness, Roughness, Specular
Using the Dial Lobe Specular
Using the Glossy Groups Properties
A Few Words About Glossy Anisotropy
A Few Words About Refraction
A Few Words About Backscattering
Bump Influence On Visual Gloss Effects
Mixing Glossy And Dual Lobe ?
Using Metallic Flakes
Top Coat Basics
Top Coat Weighted Mode
Using Reflectivity Top Coat Mode
Using Fresnel Top Coat Mode
Custom Curve Top Coat Mode
Comparison of Fresnel And Custom Curve
Conclusion Concerning Gloss
General Conclusion Concerning Skin Shading
