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Introduction

• This lesson will take you through using the V-Ray Toon shader in a Maya scene
• This lesson topic is approximately 30 minutes in length
• Lesson covers all 3 Learning Cycles for the Lesson Topic – Lecture, Demonstration, and Activity

Contents

Overview

Goal - We will apply cel shading to a robot model

Objective – To develop the look of cell shading for a 3D model

Outcome – You will be able to create your own cel shading for characters as well as props and other objects

Lecture

1. Terminology

Here’s some terms to be aware of when thinking about toon shading.

• A type of shading originally developed for cartoons, animated films, comics, etc.
• Characterized by shading with solid colors and dark outlines
• Surf. Luminance
• A standard Maya utility that can set colors based on surface luminance

a) Approach

• Areas of solid color across the surface
• Create effect with standard Maya tools
• Outline
• Dark edges of objects
• Create with VRayToon node

2. VRayToon

a) Solid color shading with the Surface Luminance utility

• Pipe the Surf. Luminance output into a ramp to vary hue based on luminance
• Pipe the ramp output into a standard material

b) VRayToon node
• Draws the outline only, does not affect surface material
• Technically, an atmospheric effect
• Adjust parameters and assign to specific objects as desired
• To use different settings for different objects, create more VRayToon nodes and assign them to those objects

c) Line Width
• Sets thickness of outline

d) Line Color
• Sets color of outline

e) Normal Threshold
• Determines the angle at which lines will be drawn within an object
• 0.0 means only  angles of 90+ degrees generate internal lines
• 1.0 fills all curved angles

Conclusion

• Cel shading is a combination of solid color shading and outlines
• VRayToon node draws outlines on geometry

Demonstration

Time to see it work!

Watch while I demonstrate how to setup a cel shader for this toy robot.

Activity

Time to do it yourself!

Use the provided  scene file to develop your own look for the robot.
We have also provided a final scene for your reference.

Dialing in the right values

• Line Color – black
• Line Width – 3
• Normal Threshold – 0.98