A renderable Entity must have a Geometry Component and a Material Component. The Material Component holds a single Material Asset, which defines the look of the geometry.
The Material Asset has a number of settings.
The Diffuse Color controls the base color of the surface.
Color is the base diffuse color.
Texture can be used to set the diffuse color from a texture.
Normal maps are a type of Bump Map. They are a special kind of texture that allow you to add surface detail such as bumps, grooves, and scratches to a model which catch the light as if they are represented by real geometry.
You set the normal map via the Texture input, and you can alter its magnitude by setting the Strength value.
Specular effects are essentially the direct reflections of light sources in your scene which typically show up as bright highlights or shines on the surface of objects (although specular highlights can be subtle or diffuse too).
You can set the base specularity Color, use a Texture and set the shininess value.
This is the self-illumination color an object has. You can set the emissive color using the Color input and/or via a Texture.
Ambient color is the color of an object where it is in shadow. This color is what the object reflects when illuminated by ambient light rather than direct light.
Color sets the base ambient color.
Texture This ambient map identifies areas on a mesh that are exposed or hidden from ambient lighting.
The opacity is used when using the Translarent Blending mode. The Strength allows you to input a value between 0 and 1 where 0.0 represents completely transparent and 1.0 represents fully opaque.
Threshold is used to indicate when a surface is completely transparent, and can be discarded from rendering.
Texture: Reflectivity texture.
Environment: Environment map that you will see in the reflection. If not selected, the current Skybox will be used.
Amount: Amount of reflectivity to use.
Fresnel: A nonzero fresnel value will result in less reflection depending on the normal direction.
The Refraction input takes in a texture or value that simulates the index of refraction of the surface. This is useful for things like glass and water, which refract light that passes through them. The environment texture will be used for the refraction.
Amount: How much refraction to blend with the current color.
Refraction: The ratio of the refractive indices involved in the refraction.
The blending mode to use for the material. You can choose between
The blending modes have individual settings.
Whether to cull on the triangle level, and which face (back, front, both) to cull.
Whether to enable depth testing, depth writing and which RenderQueue value to use.
Flat: Turns on flat shading for the mesh.
Wireframe: Renders the mesh in wireframe mode.
Adding Materials to a Material Component
All materials are viewable from the right-hand Asset Bin. From there, materials can be dragged onto the dotted Drop Material area at the top of the Material Panel.
Note that Material Assets can be shared between entities. If a Material Asset is shared, changing the look of one entity will also change the ones which are sharing the material.