I was playing around with fresnel_scale and get confused. You mentioned that when fresnel_scale=0 material should act as a diffuse material but in my tests the object gets full black (in Indigo v0.6) independent of diffuse color!
EDIT: have to say that this happens when specualar color is full white. As I like to archive a very strong reflection in fresnel case
Your Post:
Is this correct, i think the light that does not satisfy freshnel should pass on diffuse layer and should look diffuseThe biggest new feature is the fresnel_scale element for the phong material.
What this does is provide a multiplier for the fraction of light reflected in the specular mode of reflection (as opposed to diffuse)
If you set it to 0, the Phong material will basically act as a diffuse material. The element is optional in the xml, and has default value of 1
which corresponds to the old phong behaviour. The value of the fresnel scale also is the fraction of the incident light specularly reflected at grazing incidence. Hence it must be in the range [0, 1].
. Im cinfused