POV-Ray - Tips

[micheus]

An example about how to use an image plane without get any light influence. (download)
Basically we need to set these properties below in the Material dialog:

• Ambient = 1.0
  
• Diffuse = 0.0
  
• Specular = 0.0

and using the information in the 2nd and 3rd item above (global_settings->ambient_light = <1,1,1> //white)

I did some tests with some varying of values. For all of them the values for Image Plane (with UV-map) was as follow:

Code:

texture {
...
     finish {
         ambient rgb <1.000000, 1.000000, 1.000000>
         diffuse 0.000000
         brilliance 0.000000
         metallic 0.000000
         specular 0.000000
         roughness 0.000000
     }
}

Light test 1
global_settings: ambient_light <1, 1, 1>

Pink sphere

Code:

texture {
...
      finish {
        ambient rgb <0.000000, 0.000000, 0.000000>
        diffuse 1.000000
        brilliance 1.000000
        metallic 0.000000
        specular 0.8
        roughness 0.000000
      }
}

Metalic sphere

Code:

texture {
...
      finish {
        ambient 0
        diffuse 0.5
        phong 1
        phong_size 100
        reflection 0.25
      }
}

Floor

Code:

texture {
...
      finish {
        ambient 0
        diffuse 0.4
        phong 1
        phong_size 100
        reflection 0.25
      }
}

---

Light test 2
All parameters preserved, but Ambient became to contribute with 10% in the objects colors.

Pink sphere

Code:

ambient rgb <0.100000, 0.100000, 0.100000>

Metallic sphere

Code:

ambient 0.1

Floor

Code:

ambient 0.1