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| Reflection | |
|---|
| Color | Specifies the color for reflections. |
| Roughness | This controls the specular roughness. The smaller the value, the smoother is the surface. |
| Samples | Specifies how many samples to trace for reflection. |
| IOR | The IOR to use to calculate Fresnel reflections. |
| Refraction | |
|---|
| Color | The color of the refraction. Setting this color to 0 disables refraction. |
| Roughness | Specifies the roughness of the refraction. The smaller the value, the smoother is the surface. Higher values can be used to emulate "ground glass" for example. |
| Attenuation | |
| Attenuation Strength | |
| Samples | Specifies how many samples to trace for refraction. |
| IOR | The index of refraction of the glass. |
| Diffuse | |
|---|
| Color | This diffuse colour of the material. |
| Roughness | This controls how diffuse is the material. A value closer to one simulate very rough material. A value of 0 renders a standard "lambertian" diffuse. On a more technical note, this paramter controls the roughness of the Oren-Nayer diffuse model. |