Materials

Materials only contain a name, the UV Map Index, and the list of Logic Graphs that represent this material. These logic graphs may in the future have an auto-conversion method to go between them. At the moment, they need to be separately created.

message Material {
    MaterialReference MaterialReference = 1;
    string Name = 2;
    map<string, LogicGraphReference> LogicGraphReferences = 3;
    int32 UVMapIndex = 4;
}

There are a number of ways you can interact with the material:

• CreateModel & bundle the materail.
• CRUD direct on material.
• Updating the associated logic graphs, will also end up changing the material.

Updating Materials

The direct update materials command should only be used for modifying the name and other peripherals like active UV map. Updating the actual contents (ie. the Logic Graph) requires direct editing of the Logic Graph, (see updating a logic graph)

Unity Standard Shader

Unity's standard shader is basically lots of physically based rendering shaders rolled into one. This means you must enable or disable the keywords to use different parts of the shader.

Keyword	Use
_NORMALMAP	Normal mapping
_ALPHATEST_ON	"Cut out" transparency
_ALPHABLEND_ON	"Fade" transparency
_ALPHAPREMULTIPLY_ON	"Transparent" transparency
_EMISSION	Emission colour or Emission mapping
_PARALLAXMAP	Height mapping
_DETAIL_MULX2	Secondary "detail" maps
_METALLICGLOSSMAP	Metallic/smoothness mapping
_SPECGLOSSMAP	Specular/smoothness mapping

Full list of properties on a Unity Standard Shader.

Index	Property Name	Type	Maps to
0	_Color	Color	Named material property.
1	_EmissionColor	Color	Named material property.
2	_EmissionColorUI	Color	Named material property.
3	_EmissionColorWithMapUI	Color	Named material property.
4	_Specular	Color	Named material property.
5	_AlphaTestRef	Float	Named material property.
6	_BumpScale	Float	Named material property.
7	_Cutoff	Float	Named material property.
8	_DetailNormalMapScale	Float	Named material property.
9	_DstBlend	Float	Named material property.
10	_EmissionScaleUI	Float	Named material property.
11	_GlossMapScale	Float	Named material property.
12	_Glossiness	Float	Named material property.
13	_GlossyReflections	Float	Named material property.
14	_Lightmapping	Float	Named material property.
15	_Metallic	Float	Named material property.
16	_Mode	Float	Named material property.
17	_OcclusionStrength	Float	Named material property.
18	_Parallax	Float	Named material property.
19	_SmoothnessTextureChannel	Float	Named material property.
20	_SpecularHighlights	Float	Named material property.
21	_SrcBlend	Float	Named material property.
22	_UVSec	Float	Named material property.
23	_ZWrite	Float	Named material property.
24	_BumpMap	Texture Map (LinkOnly)	Named material property.
25	_Detail	Texture Map (LinkOnly)	Named material property.
26	_DetailAlbedoMap	Texture Map (LinkOnly)	Named material property.
27	_DetailMask	Texture Map (LinkOnly)	Named material property.
28	_DetailNormalMap	Texture Map (LinkOnly)	Named material property.
29	_EmissionMap	Texture Map (LinkOnly)	Named material property.
30	_MainTex	Texture Map (LinkOnly)	Named material property.
31	_MetallicGlossMap	Texture Map (LinkOnly)	Named material property.
32	_Occlusion	Texture Map (LinkOnly)	Named material property.
33	_OcclusionMap	Texture Map (LinkOnly)	Named material property.
34	_ParallaxMap	Texture Map (LinkOnly)	Named material property.
35	RenderQueue	Queue number (int)	The render queue int directly.
36	LightmapFlags	Flags (int)	The LightmapFlags (which is an enum, needs casting).
37	SpecularSetup	Bool	Doesn't map, just defines which of the shaders needs loading.
38	_NORMALMAP	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
39	_ALPHATEST_ON	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
40	_ALPHABLEND_ON	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
41	_ALPHAPREMULTIPLY_ON	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
42	_EMISSION	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
43	_PARALLAXMAP	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
44	_DETAIL_MULX2	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
45	_METALLICGLOSSMAP	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.
46	_SPECGLOSSMAP	Shader Keywords (bool)	Doesn't map, but if true, you need to enable that shader keyword.

The keywords are listed on the Unity Materials Documentation. A great reference for how to organise these keywords based on Blend Mode can be found in this thread.