Component:PBS Metallic

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Component image 

PBS_Metallic component as seen in the Scene Inspector

PBS Metallic is a physically-based material that uses a Metallic-Smoothness (MS) map to store data about the metallicity and smoothness of an object. It is based on the Unity 5 Standard PBR Setup.

For information about the maps and their properties read on!

Usage

Fields

Name	Type	Description
persistent	Bool	Determines whether or not this item will be saved to the server.
UpdateOrder	Int	Controls the order in which this component is updated.
Enabled	Bool	Controls whether or not this component is enabled.
HighPriorityIntegration	Bool
_shader	Shader
TextureScale	Float2
TextureOffset	Float2
DetailTextureScale	Float2
DetailTextureOffset	Float2
AlbedoColor	Color
AlbedoTexture	ITexture2D
EmissiveColor	Color
EmissiveMap	ITexture2D
NormalScale	Float
NormalMap	ITexture2D
HeightMap	ITexture2D
HeightScale	Float
OcclusionMap	ITexture2D
DetailAlbedoTexture	ITexture2D
DetailNormalMap	ITexture2D
DetailNormalScale	Float
BlendMode	BlendMode
AlphaCutoff	Float
OffsetFactor	Float
OffsetUnits	Float
RenderQueue	Int
Metallic	Float
Smoothness	Float
MetallicMap	ITexture2D

Behavior

Metallic Maps

This Material type uses a Metallic Map for determining:

• Metallic Levels
• Ambient Occlusion/Height
• Smoothness

This information is packed into different channels within the Metallic Map using the following pattern:

• R(Red Channel): Metallic
  • The Red Channel determines how metallic a material is.
  • Metals are usually 1 in this channel and non-metals (also known as dielectrics) are 0
  • When choosing Metallic values, do remember that items in the real world aren't perfect. Imperfections and randomness is good! A common misconception is that pixels within a metallic map must be pure 0 or 1 values, however this is not the case. If you were able to zoom in far enough into a material you could observe pure metal and pure non-metal parts (rust would be metal with a separate layer of oxidized material), but with textures, you only have a limited number of pixels to represent individual characteristics of materials. When authoring these textures, what you are actually doing is describing the average characteristic in the area of interest. It is therefore accurate to describe materials such as rust as somewhere between 0 and 1 on average in an area depending on how much oxidation versus metal there is.
• G (Green Channel): Ambient Occlusion/Height
  • This allows you to pack either the Ambient Occlusion or the Height map data into one image and re-use it in those inputs to the material, depending on which you prefer to use.
• Alpha: Smoothness
  • High Alpha means High Smoothness
  • Low Alpha is Low Smoothness

Resonite uses the Unity Standard Shader Maps for this Material, for more information please see this guide for more information.

Other Maps

TODO

Unity declares Green : Occlusion and Height as interchangeable and usable for both slots

https://forum.unity.com/threads/standard-shader-metallic-texture-packing.314283/

R: Metalness

G: Occlusion/Height

A: Smoothness

Further Reading

You may be interested in the following other pages:

• PBS Specular - Documentation on Resonite's PBS Specular Material. This is often paired or compared to PBS Metallic.