Iridescent#
(MaterialPhysicalIridescent)
- Category:
/Material/Physical - Default object name:
iridescent
Description#
Iridescent material
Attributes#
| Name | Type | Description |
|---|---|---|
| Export Aovs | bool |
Compute and write Aovs defined in the shading graph |
| Arbitrary Output Variables | reference (AovStore) |
Set the list of extra channels to write to the image. |
| Light Path Expression Label | string |
Set the material label in light path expressions. |
| Material Sample Count | long |
Material sample count per pixel. |
| Diffuse Sampling Multiplier | double |
Material diffuse sample count multiplier. |
| Glossy Reflection Sampling Multiplier | double |
Material glossy reflection sample count multiplier. |
| Russian Roulette | double |
Amount of Russian roulette used on the material samples. |
| Roughness Noise Optimization | double |
Noise reduction strategy along rough light path. |
| Multiple Scattering Strength | double |
Strength of compensation for energy lost by multiple scattering. |
| Diffuse Depth | long |
Maximum diffuse depth. |
| Specular Reflection Depth | long |
Maximum specular reflection depth. |
| Glossy Reflection Depth | long |
Maximum glossy reflection depth. |
| Opacity | double[3] |
Opacity of the material. |
| Normal Mode | long |
Define which geometric normal to use for the shading. |
| Normal Input | double |
Override the shading normal by the one given as input. The value controls the blending with the original normal. |
| Sidedness | long |
Sidedness of this surface used for this material. 'Single' keeps the original normals no matter what. 'Double' may flip the normal to be oriented toward the incomming direction. 'Invert' flips the original normal no matter what. |
| Shadow Casting Mode | long |
Defines the properties of the material when casting shadows: fully opaque (regardless of the actual value of the opacity of the material), artistic (user-defined opacity and coloring), pseudo-caustics (cheaply emulating actual refractive caustics) or physical (intrinsic transparency of the material), where the last three are modulated by the opacity of the material. |
| Shadow Opacity | double |
Defines how dark the shadows cast by this material are. |
| Shadow Coloring | double |
Defines how much refraction and absorption colors affect shadowing. |
| Reflective Caustics | long |
Reflective caustics computation mode. |
| Diffuse Brdf | long |
BRDF used for the diffuse reflection. The Lambertian model is augmented with a Fresnel term to approximate rough diffuse reflection. The Oren-Nayar BRDF better models back-scattering effects that characterize rough diffuse reflection, accounting for both single and double bounces of light onto the micro-geometry of the surface. |
| Diffuse Color | double[3] |
Define the diffuse color. |
| Diffuse Gain | double |
Diffuse gain of the diffuse color. |
| Diffuse Roughness | double |
Roughness of the diffuse surface. For Fresnel Lambertian, values smaller than 50% slightly darken grazing angles, and values greater than 50% give the silhouettes a subtle glow (albeit potentially violating energy conservation), whereas a midrange value approaches (but differs from) the pure Lambertian model. For Oren-Nayar, a zero value yields the pure Lambertian model, whereas greater values increase backward scattering phenomena. |
| Brdf | long |
BRDF used for the reflection. |
| Reflection Color | double[3] |
Define the reflection color. |
| Reflection Gain | double |
Reflection gain of the reflection color. |
| Reflection Exit Color | double[3] |
Set the reflection color when there is no more bounce along the path. |
| Fresnel Ior | double |
Set the index of refraction. |
| Reflection Roughness | double |
Roughness of the reflection surface. |
| Iridescent Exposure | double |
Iridiscent exposure. |
| Iridescent Power | double |
Exponent for the iridescence, corresponds to the interference power which is proportional to the number of thin layers constituting the material. |
| Iridescent Film Thickness | double |
Thickness of the film layers (expressed in nanometers), through which light is refracting. |
| Iridescent Air Thickness | double |
Thickness of the air layers (expressed in nanometers), in other words spacing between the film layers. |
| Iridescent Diffuse | bool |
Enables/disables iridescent absorption on the diffuse component. |
| Iridescent Reflection | bool |
Enables/disables iridescent absorption on the specular component. |