Shaders

usa_flag - A procedural shader for a U.S. Flag

This Renderman shader applies a U. S. flag texture to a surface.

The star algorithm is from Peachey's "Textures and Modeling, A Procedural Approach", published by Academic Press.

The user can control the usual parameters for plastic shading.

Parameter	Data Type	Usage	Example
fuzz	float 0.0 to 1.0	Color blending width	fuzz = 0.2
Ka	float 0.0 to 1.0	ambient lighting value
Kd	float 0.0 to 1.0	diffuse lighting value
Ks	float 0.0 to 1.0	specular lighting value
roughness	float	Used with the plastic shading method
specular_color	color	Used with the plastic shading method

View the usa_flag shader source

Download the usa_flag package for Presenter 3D