Documentation



Menu

TwoLobeDielectric

A component for representing the reflectance properties of non-metals such as plastics, ceramics and glass. It is similar to the Dielectric component, but supports the creation of advanced glossy reflections that have two 'lobes' or highlights of differing size.

This component follows Fresnel's Law where the amount of reflectance varies based on the angle of view. For example, viewing a carbon fiber type object at very shallow angles results in almost complete reflectance whereas looking straight on, the object exhibits less reflectance. This Fresnel falloff can be defined explicitly by setting reflectance values for 0˚ (when looking at the middle of a spherical object) and 90˚ (when looking at a spherical object's edge). You can define how quickly the falloff varies between 0˚ and 90˚ via an exponent parameter. The Fresnel effect can also be controlled by specifying the Index of Refraction, which effectively defines the above values for you.

Editing a component using TwoLobeDielectric

Diffuse

DiffuseColour

Defines the basic color of the component. This can be a single color value or a texture map.

Input: Color or Map

DiffuseColour: White
DiffuseColour: White
DiffuseColour: Black
DiffuseColour: Black
DiffuseColour: Red
DiffuseColour: Red

Click material thumbnail for larger view

Reflection

ReflectedColour

Can be used to control the color of reflections or, using grayscale, the amount of reflections.

Input: Color or Map

ReflectedColour: White
ReflectedColour: White
ReflectedColour: Black
ReflectedColour: Black
ReflectedColour: Red
ReflectedColour: Red

Click material thumbnail for larger view

RoughnessLobe1

Controls the size of glossy highlights for the primary lobe. Higher values will result in more blurred reflections.

Input: 0.0 – 1.0 or Map

RoughnessLobe1: 0.0
RoughnessLobe1: 0.0
RoughnessLobe1: 0.5
RoughnessLobe1: 0.5
RoughnessLobe1: 1.0
RoughnessLobe1: 1.0

Click material thumbnail for larger view

RoughnessLobe2

Controls the size of glossy highlights for the secondary lobe. Higher values will result in more blurred reflections.

Input: 0.0 – 1.0 or Map

RoughnessLobe2: 0.0
RoughnessLobe2: 0.0
RoughnessLobe2: 0.5
RoughnessLobe2: 0.5
RoughnessLobe2: 1.0
RoughnessLobe2: 1.0

Click material thumbnail for larger view

Exponent

Controls how quickly the shininess changes between the NormalReflectivity and GrazingReflectivity values (see below) as you move across the surface.

Range: 0.01 – 25.0

Exponent: 0.01
Exponent: 0.01
Exponent: 1.0
Exponent: 1.0
Exponent: 5.0
Exponent: 5.0

Click material thumbnail for larger view

NormalReflectivity

Controls how shiny the object appears when viewed straight on. Materials of this type typically display little reflectance at 0˚ to the camera.

Input: 0.0 – 1.0 or Map

NormalReflectivity: 0.0
NormalReflectivity: 0.0
NormalReflectivity: 0.1
NormalReflectivity: 0.1
NormalReflectivity: 0.5
NormalReflectivity: 0.5

Click material thumbnail for larger view

GrazingReflectivity

Controls how shiny the object appears when viewed at a very shallow angle. Materials of this type typically display higher reflectance at 90˚ to the camera.

Input: 0.0 – 1.0 or Map

GrazingReflectivity: 0.0
GrazingReflectivity: 0.0
GrazingReflectivity: 0.5
GrazingReflectivity: 0.5
GrazingReflectivity: 1.0
GrazingReflectivity: 1.0

Click material thumbnail for larger view

UseIOR

Ignores the Exponent, NormalReflectivity, and GrazingReflectivity settings, and instead uses the IOR parameter (see below) to define the falloff curve.

Input: On/Off Checkbox

Refraction

IOR

Index of Refraction. Controls the amount of reflection and shape of the falloff curve. UseIOR must be ticked.

Range: 0.0 – 50.0

IOR: 1.1
IOR: 1.1
IOR: 2.5
IOR: 2.5
IOR: 10.0
IOR: 10.0

Click material thumbnail for larger view

Material Components using TwoLobeDielectric

Click material thumbnail for larger view

Base

TwoLobeDielectric: CeramicWhiteware
CeramicWhiteware
TwoLobeDielectric: Clay
Clay
TwoLobeDielectric: Leather
Leather
TwoLobeDielectric: PlasticOpaque
PlasticOpaque


Back to Material Components overview

Last edited: