MEL to change "Link to Layer Set" option in psdFileTex node

[davus]

Here's the scenario, I have a PSD with 73 Layer sets in it. I want to load each of them into PSD textures and connect them to a switch whose out color is connected to a surface shader. That surface shader is then applied to 73 sequentially numbered objects. I couldn't find a way to change the layer set names on the texture nodes using MEL, so I had to export each layer set as an individual file and then load them that way. This is fine i guess, except in the interest of my sanity I'd love to have just one PSD to manage and use layer sets to connect to my network.

I run into this situation a lot and am trying to automate this the best i can for the future. If anyone could help me figure out how to change the "Link to Layer Set" option in MEL I'd greatly appreciate it. Usually I just make a connection/change an attribute and watch what happens in the script editor, but when I change the layer set on the psdNode nothing happens. Even if I have Echo all Commands on it isn't very clear to me what's happening.

*As a side note, if anyone knows of a script to batch rename Layer Sets in Photoshop I'd love to hear from you. I have a good one that renames layers but it completely ignores Layer Sets/Groups.

Thanks!  -DD

Below is the code I used to achieve the result thus far:

///// Connect PSD nodes to switch (Select Tex Nodes First)

string $selectedObjects[] = ls -sl;

$switchNode = "tripleShadingSwitch1";

    for($i = 0; $i < 73; $i++) {     

         connectAttr -f ($selectedObjects[($i)] + ".outColor") ($switchNode + ".input[" + ($i) + "].inTriple");

    };

///// Load Sequentially numbered psd's to Sequentially numbered psd textures (Select Tex Nodes First)

string $selectedObjects[] = ls -sl;

    for($i = 0; $i < 73; $i++) {

         setAttr -type "string" ($selectedObjects[($i)] + ".fileTextureName") ("/Volumes/PathToFile/BG_" + (($i) + 1) + ".psd");

    };

[joojaa]

set node to group:

setAttr psdFileTex1.layerSetName -type "string" "Group 1";

get al availabe groups in order form down up of what they were in photoshop

getAttr psdFileTex1.layerSets

See the node documentation entry for psdFileTex in your node refernce for more info.

if anyone knows of a script to batch rename Layer Sets in Photoshop I'd love to hear from you.

#target photoshop

// in case we double clicked the file
app.bringToFront();

var docRef = app.activeDocument;
var layers = docRef.layers;
var numLayers = layers.length;
var layerSetNum = 1

for (var j = 0; j < numLayers; j++) {
var currentLayer = layers[j];

if (currentLayer.typename == 'LayerSet'){
    currentLayer.name = 'layerSet'+layerSetNum;
    layerSetNum += 1
}

}

[davus]

Joojaa - you're a god send, thanks so much!