Advanced Channel Packing

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An advanced technique for packing data into texture channels that allows you to represent all of the texture data needed for a material in just two texture samples. Using this method saves both texture memory and performance, but since you're packing non-normal data in with the normal map, you do lose a little bit of quality in the normal. It also requires doing some extra steps in the shader to unpack the normal data

Traditional 5-Map set-up:

1. Albedo / Diffuse
2. Metalic
3. Roughness
4. Normal
5. Ambient Occlusion

ORMS 3-Map set-up:
Does exactly the same as the 5-Map material but in 3.

1. Albedo / Diffuse 
2. Metal, Roughness and AO 
3. Normal

Advanced Channel Packing 2-Map set-up:
Does almost exactly the same as the 3-Map material but in 2.

1. Albedo / Diffuse + Roughness in the Alpha Channel
2. Red and Green Channel for Normal, Blue for AO

*Make sure SRGB is set to off and to use BC7 in the compression settings for the textures.

Watch the tutorial here:




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