1. Exploring Shaders in Unity
Greg Miranda
Exploring Shaders in Unity

2. Introduction
Who am I?
What is a shader?
Why are shaders important?

3. Basic Rendering Pipeline
Rasterization
Blending
Vertex Shader
Pixel Shader
(Fragment Shader)
Frame Buffer

4. Advanced Rendering Pipeline
Shader Model 5 – DirectX 11
Hull Shader
Domain Shader
Hardware Tesselator
Shader Model 4 – DirectX 10
Geometry Shader
Shader Model 3 – DirectX 9, OpenGL
Vertex Shader
Pixel Shader
(Fragment Shader)
Frame Buffer

5. Lighting
Specular
Diffuse

6. Lighting - Diffuse
Assume that light is reflected uniformly in all directions
Lambertian term
Basic idea:
The light energy is spread out over a large surface area when the light is at an angle
Diffuse = EL * Kd * dot(N, L)

7. Lighting - Specular Mirror Reflection Shininess Blinn-Phong
Relates better to micro-facet BRDF theory
Uses Half-Vector
H = normalize(V + L)
Specular = EL * Ks * (H ∙ N)s

8. PBR Physically Based Rendering
Term for any technique that tries to achieve photorealism using a physical simulation of light.
The rendering equation
Tries to describe how a "unit" of light is obtained given all the incoming light that interacts with a specific point of a given scene.

9. Custom Shaders Standard Surface Shader Unlit Shader
Image Effect Shader
Compute Shader

10. Wrap-Up
Questions?