Reflectancy

SHADER TYPE: Phong

Phong is a reflectivity type that enables Phong-type environment effects to the material. In Phong reflection, the reflections are greatest on the specular side of the surface, opposite to the viewing direction. This reflectivity type is especially suitable for shiny, polished materials, such as ceramics and glass.

Parameter: Explanation: Default value: Possible values and comments:
Ambient Factor Reflectivity factor of ambient light 1
Diffuse Factor Reflectivity factor of diffuse light 0.75
Specular Factor Specular factor 0.5
Exponent A factor affecting the sharpness of the reflection 10 At small values, the reflection is sharper. High values like 10 make the surface less mirror-like.
Specular Colour Colour of the reflection (255,255,255) All RGB values

 

examp2.gif (16612 bytes)
An example with its default values:
Object Colour: (0,0,170)
Reflectivity: Matte 1 1
Background: Clouds 10 (120,190,255) (200,255,255) 3
Ambient Light: 0.55 (255,250,245) TRUE
Distant Light: 0.65 (255,255,255) (19610,-6767,17933) (0,0,0) TRUE 2048 9 1 (255,255,255) TRUE
phong1.gif (10051 bytes)
Ambient Factor: 1
Diffuse Factor: 0.75
Specular Factor: 0.5
Exponent: 10
Specular Colour: (255,255,255)		 phong2.gif (8555 bytes)
Ambient Factor: 1.2
Diffuse Factor: 0.75
Specular Factor: 0.5
Exponent: 10
Specular Colour: (255,255,255)
phong3.gif (10984 bytes)
Ambient Factor: 1.2
Diffuse Factor: 0.95
Specular Factor: 0.5
Exponent: 10
Specular Colour: (255,255,255)		 phong4.gif (10985 bytes)
Ambient Factor: 1.2
Diffuse Factor: 0.95
Specular Factor: 0.8
Exponent: 10
Specular Colour: (255,255,255)
phong5.gif (11594 bytes)
Ambient Factor: 1.2
Diffuse Factor: 0.95
Specular Factor: 0.8
Exponent: 1
Specular Colour: (255,255,255)		 phong6.gif (14070 bytes)
Ambient Factor: 1.2
Diffuse Factor: 0.95
Specular Factor: 0.8
Exponent: 1
Specular Colour: (255,0,0)
phong7.gif (12905 bytes)
Ambient Factor: 1
Diffuse Factor: 1
Specular Factor: 0.7
Exponent: 1
Specular Colour: (255,255,255)

 

phongexa.gif (15579 bytes)
Colour: Plain
Colour (127,173,133)

Reflectivity: Phong
Ambient Factor: 1
Diffuse Factor: 1
Specular Factor: 0.7
Exponent: 1
Specular Colour: (255,255,255)
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