Video 4 covers how to work with multiple lights and light colors in our shader through a light loop.  Also we add the ambient color attribute which rounds out our basic attributes.

Download: shader_demo_04.cgfx – completed shader file from the demo
                  shader_demo_04b.cgfx - with smoothstep() specular masking 

Runtime: ~20 min.

Software: Maya

Instructor: Leo Covarrubias

Part 3 of the series covers adding a Blinn specular highlight to the shader and breaking the code down into seperate functions for lambert and blinn components.

Download: shader_demo_03.cgfx – the completed shader from the video.

Runtime: ~20 min.

Software: Maya

Instructor: Leo Covarrubias

Addendum:

Here i talk about masking the specular highlight so it only appears on the illuminated portions of the mesh and does not spill over into areas that have no light.

Download: shader_demo_03b.cgfx

Runtime: ~8 min.

Software: Maya

Instructor: Leo Covarrubias

In this part of the CGFX Shader Writing series I continue to expand the shader by adding user tweakable variables and I demonstrate how to implement a Lambert diffuse shading function with one light.

Download: shader_demo_02.cgfx – the completed shader file from the video.

Runtime: ~30 min.

Software: Maya

Instructor: Leo Covarrubias

In this video I cover the basics of CGFX shader code and show how to put together the most basic shader possible for Maya – a flat color.

Download: shader_demo_01.cgfx – the completed shader file from the demo.

Note: Hobbes the Cat really, really wanted his dinner and he likes to remind me that I don’t know what I’m doing.

Runtime: ~45 min.

Software: Maya, ‘Any Text Editor’

Instructor: Leo Covarrubias