Specular mapping is a component that can finely control the specular reflection on a rendered surface.

Asset requirements

• Specular Map texture – RGBA texture. The specular map uses two channels to customize the specular behavior on the surfaces:

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  • Red channel holds the specular exponent info (also known as shininess or glossiness), so it controls how blurry or sharp the specular shine is rendered:

    • higher values make the shine small and sharp

    • lower values make the shine large and blurry

  • Green channel holds the specular intensity info:

    • 0 means no specular shine

    • 255 is max shine intensity

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Emissive – as part of the Specular component

Adds the emissive component to the surface shading. The Emissive just boosts up the diffuse color based on the specular map blue channel.

Asset requirements

• Specular Map Texture – RGBA texture.

  • Blue channel holds the emissive intensity information:

    • lower the values – less emissive and more influenced by lighting

    • higher values – more emissive.