Auto Conversion Rule (New for 1.03)

The Auto Convert V2 is aiming to get the identical reflective surface look between iClone real-time material and Indigo ray-trace rendering. Auto Convert V2 has enhanced the non-linear conversion equation between iClone specularity, glossiness, and Indigo IOR, Exponent and Fresnel values. Auto Convert V2 is a mild modification of the former preset. Under the hood, the preset models a Phong material in Indigo.

Specular and Glossiness exponential mapping in iClone

Unlike the Auto Convert shader preset of the first version, the V2 mapping for the Specular and Glossiness of iClone and IOR and Exponent of Indigo is non-linear.

• Exponential mapping curve for Specular to IOR.
  
• Exponential mapping curve for Glossiness to Exponent.
  
• Side by side comparison of shininess mapping in iClone and Indigo:

  The combinations of Specular and Glossiness in iClone.	Render Results in Indigo

Ranges for Applications

For the sake of simplicity, one can acknowledge 3 distinct classifications of shininess: Weak Highlight, Medium Highlight and Strong Highlight.

• Weak Highlight: Specular value from 0 to 75.
  
  Weak highlights are suitable for objects with minimum reflectivity such as cloth or human skin.

  Project created in iClone. Human Skin: Specular: 75 Glossiness: 90 Towel: Specular : 75 Glossiness : 10	Render Results in Indigo Human Skin: IOR: 1.3 Exponent: 4459 Towel: IOR: 1.3 Exponent: 16

• Medium Highlight: Specular value from 75 to 400.
  
  Medium highlights are suitable for object with slight reflectivity such as plastic.

  Project created in iClone. Beach Ball: Specular: 200 Glossiness: 30 Robots: Specular : 400 Glossiness : 10 Toy Car: Specular : 400 Glossiness : 5	Render Results in Indigo Beach Ball: IOR: 1.6 Exponent: 300 Robots: IOR: 2.7 Exponent: 18 Toy Car: IOR: 2.7 Exponent: 10

• Strong Highlight: Specular value from 400 to 1000.
  
  Strong highlights are suitable for objects with high reflectivity such as metallic objects.

  Project created in iClone. Pot and Silverware: Specular: 999 Glossiness: 100 Table: Specular : 600 Glossiness : 10	Render Results in Indigo Pot and Silverware: IOR: 10.23 Exponent: 9999 Table: IOR: 4.49 Exponent: 18