If you cannot use the compound node this is no big disadvantage. It is just a little more difficult to identify where to connect the initial material with the shader node structure.

The screenshot above should give you sufficient information about where to connect.

Basically, the foam shader has to be inserted right before the material enters the Poser Surface Node. This applies for diffuse, displacement and specularity, all those are now diverted through the foam shader in order to add the foam material.

So connect your initial materials to the DisplaceBlendOrig (Input_2), to the DiffuseBlendOrig (Input_1) and to the SpecBlendOrig (Input_1) nodes.

Procedure for picking colors from Poser Surface Input channels is the same as described above for the compound node.

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