Page History

Image Added

 – Specifies the diffuse color for the base layer.

Reflection –

Specifies the reflectivity of the base layer. The reflection color itself is the same as the

base Color.

Glossiness –

Specifies reflection glossiness for the base layer.

Bump Type – Specifies whether a bump map or a normal map effect

is added to the base material. 

Bump

 – Applies the map as a bump map.
Normal (Tangent)

 – Applies the map as a normal map in tangent space.
Normal (Object)

 – Applies the map as a normal map in object space.
Normal (Camera)

 – Applies the map as a normal map in screen/camera space.
Normal (World)

 – Applies the map as a normal map in world space.
From Bump

 – The map is applied as determined by map type itself.
Explicit Normal

 – Applies the map as an explicit normal.

Bump Strength

 – Controls the strength of the the bump/normal effect on the base layer.

Trace Base Reflection

 – Toggles reflections for the base layer

 – Specifies the method for mapping the flakes. The possible values are:

Explicit

 – The flakes are mapped using the specified channel.
Triplanar

 – The material automatically computes mapping coordinates in object space based on the surface normals.

Mapping Channel –

Specifies the mapping channel for the flakes when the Flake mapping type is set to Explicit mapping channel.

Color –

Specifies the color of the metal flakes.

Glossiness –

Specifies the glossiness of the metal flakes. It is not recommended to set this

above 0.9

 as it may produce artifacts.

Orientation – Controls the orientation of the flakes relative to the surface normal. When this

is 0.0, all flakes are perfectly aligned with the surface. When it

is 1.0, the flakes are rotated completely randomly with respect to the normal. Values

above 0.5

 are not recommended as they can produce artifacts.

 For more information, see

 The Flake Orientation Parameter example

 below. 

Density

 – Specifies the density (number of flakes) for a certain area. Lower values produce less flakes and higher values produce more flakes. Set this

to 0.0

 to produce a material without flakes. For more information,

see The Flake Density Parameter example

 below. 

Scale

 – Scales the entire flake structure. For more information,

see The Flake Scale Parameter

example below.

Size

 – Specifies the size of the flakes relative to the distance between them. Higher values produce bigger flakes and lower values produce smaller flakes. For more information,

see The Flake Size Parameter example

 below. 

Map Size

 – Internally the material creates several bitmaps to store the generated flakes. This parameter determines the size of the bitmaps. Lower values reduce RAM usage, but may produce noticeable tiling in the flake structure. Higher values require more RAM, but tiling is reduced. Be careful when using the Directional filtering method, as it may quickly take up gigabytes of RAM for larger map sizes. For more information, see

the Antialiasing Filters example

 below. 

Filtering Mode

 – Determines the way the flakes are filtered. Filtering is extremely important to reduce the work required to produce a clean image. For more information,

see The Flake Filtering Parameter example

 below.

Simple

 – This method is faster and uses less RAM but is less accurate. It averages the orientation of the flakes together, which may alter the appearance of the material when viewed from a distance. 
Directional

 – This method is slightly slower and uses more RAM, but is more accurate. It groups the flakes based on their orientation before performing the filtering, so that the material appearance is preserved.  

Seed

 – The random seed for the flakes. Changing this produces different flake patterns.

Trace Flakes Reflections

 – Toggles reflections for flake layer.

are traced for all layers of the Car Paint material.

Trace Depth – Specifies the number of times a ray can be reflected. Scenes with lots of reflective and refractive surfaces may require higher values to look correct. A value

of -1

 specifies this option is controlled by the

global Render Settings.

Subdivs – Determines the amount of samples for the glossy reflections of the different layers

.

Cutoff

 – Cutoff threshold for the reflections of the different layers.

Use Environment Override – Enables the use of the Environment Override color or texture.

Environment Override

 – A color or texture that is used as an environment for the material.

Environment Priority

 – Specifies the environment override priority when several materials override it along a ray path.

the Orientation

 parameter. Note how lower values produce flakes more aligned with the surface normal, so that light is reflected more uniformly. Higher values produce more random flakes leading to more variation in the flake illumination.

Example: The Flake Density Parameter

This set of images shows the effect of

the Density

 parameter. Note how larger values produce more flakes, but do not change the flake size.

Example: The Flake Scale Parameter

This set of images

demonstrates the effect of

the Scale

 parameter. Note how lower values scale the entire flake structure.

Example: The Filtering Mode Parameter

This example shows the effect of

the Filtering Mode

 parameter.

Example: Anti-aliasing Filters

Here is an example briefly demonstrating the effect of different anti-aliasing filters on the final result.

Note that rendering with a particular filter is not the same as rendering without a filter and then blurring the image in a post-processing program like Adobe Photoshop. Filters are applied on a sub-pixel level, over the individual sub-pixel samples. Therefore, applying the filter at render time produces a much more accurate and subtle result than applying it as a post effect.