Layering Declare Stacks - Shader API

Material layering: declare editable stacks

An editable stack is defined by a unique identifier and a list of document channels. Possible channel id(s) are: ambientocclusion anisotropyangle anisotropylevel basecolor blendingmask diffuse displacement emissive glossiness height ior metallic normal opacity reflection roughness scattering specular specularlevel transmissive user0 user1 user2 user3 user4 user5 user6 user7

Example:

//:  stacks [

//:    {

//:      "id": "Mask1",

//:      "channels": [

//:        {"id": "opacity"}

//:      ]

//:    }, {

//:      "id": "Mask2",

//:      "channels": [

//:        {"id": "opacity"},

//:        {"id": "user0"}

//:      ]

//:    }

//:  ]

To bind a channel from a stack to a sampler parameter, prefix the channel tag with the stack identifier:

//: param auto Mask1.channel_opacity

uniform sampler2D mask_tex1;

//: param auto Mask2.channel_opacity

uniform sampler2D mask_tex2;