Flexible Material Model

MDL Identifier: core_definitions::flex_material_v2

Description: A complex material that can be configured for a wide variety of looks.

Display Name	Type	Parameter	Default	Description
Base Color	color	base_color	color(0.5)	The color of the material
Diffuse Roughness	float	diffuse_roughness	0.0	Higher roughness values lead to a more “powdery” look
Metallic Material	float	is_metal	0.0	If 1.0, reflection will be colored and independent of view direction. If 0.0, reflection will be white and direction dependent. Directional dependence is in this case based on the IOR (Fresnel effect).
Reflection Weight	float	reflectivity	1.0	Controls the amount of reflection
Reflection Roughness	float	reflection_roughness	0.3	Higher roughness values lead to more blurry reflections
Reflection Anisotropy	float	anisotropy	0.0	Higher values will stretch the highlight
Anisotropy Rotation	float	anisotropy_rotation	0.0	Changes the orientation of the anisotropy. A value of 1 will rotate the orientation 360 degrees.
Transmission Weight	float	transparency	0.0	Weights how much light passes through the object compared to its diffuse reflectivity.
Transmission Color	color	transmission_color	color(1.0)	Color effect for transmission independent of thickness of the object, similar to stained glass.
Volume Color	uniform_color	volume_color	color(1.0)	If the material is not “Thin walled”, “Volume color” will be reached at “Volume reference distance” (m).
Transmission Roughness	float	transmission_roughness	0.0	Higher values lead to objects seen through the material to appear blurry
Volume Reference Distance	uniform_float	base_thickness	0.1	If the material is not “Thin walled”, “Volume color” will be reached at this distance (m). Enter a typical thickness of objects made of this material here.
IOR	uniform_float	ior	1.5	Determines refraction in the volume. It also influences the reflectivity for materials that are not metallic.
Thin Walled	uniform_bool	thin_walled	false	Thin walled materials do not refract and do not have volume effects. Good for soap bubbles or window glass.
Bumps	float3	normal	state::normal()	Attach bump or normal maps here
Abbe Number	uniform_float	abbe_number	0.0	Controls dispersion. A value of 0 switches dispersion off. Dispersive materials have Abbe numbers between 25 and 85