Ah, no the above script just puts all the layers on top of each other, then merges like named layers.
The following script will just merge like named layers, it might be best to run it about every ten psds, then it only working on 600 layers at a time.
Also this thread might be of interest..
http://forums.adobe.com/thread/492005?tstart=0
#target photoshop
app.bringToFront();
main();
function main(){
checkBackGround();
setLayersVisOn();
mergeSameNamedLayers();
}
function checkBackGround(){
activeDocument.activeLayer = activeDocument.layers[activeDocument.layers.length-1];
if(activeDocument.activeLayer.isBackgroundLayer){
activeDocument.activeLayer.name=activeDocument.activeLayer.name;
}
}
function twoOrMoreSelected(){
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
var desc = executeActionGet(ref);
if( desc.hasKey( stringIDToTypeID( 'targetLayers' ) ) ) return true;
return false;
}
function mergeSameNamedLayers(){
//Get a list of the layer names
var layerNameList = getNamesPlusIDs();
//create an array for unique layer names
var uniqueName = new Array();
for(var s in layerNameList){
if(layerNameList[2] == "false") uniqueName.push( layerNameList[1].toString());
}
//now we should have unique layer names
uniqueName = UniqueSortedList( uniqueName ).sort();
//select all layers with the same name, merge them and set blendmode
var BlendMode = new String();
for ( var w in uniqueName){
deselectLayers();
for(var z in layerNameList){
if(uniqueName.toString() == layerNameList[1].toString()){
//select these layers and get blendmode.
BlendMode = layerNameList[3].toString();
selectLayerById(Number(layerNameList[0]), true);
}
}
if(twoOrMoreSelected()) activeDocument.activeLayer.merge();
setBlendMode(BlendMode);
}
};
function setBlendMode(blendMode) {
var desc = new ActionDescriptor();
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
desc.putReference( charIDToTypeID('null'), ref );
var desc2 = new ActionDescriptor();
desc2.putEnumerated( charIDToTypeID('Md '), charIDToTypeID('BlnM'), stringIDToTypeID(blendMode) );
desc.putObject( charIDToTypeID('T '), charIDToTypeID('Lyr '), desc2 );
executeAction( charIDToTypeID('setd'), desc, DialogModes.NO );
};
function deselectLayers() {
var desc01 = new ActionDescriptor();
var ref01 = new ActionReference();
ref01.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
desc01.putReference( charIDToTypeID('null'), ref01 );
executeAction( stringIDToTypeID('selectNoLayers'), desc01, DialogModes.NO );
};
function UniqueSortedList(ArrayName){
var unduped = new Object;
for (var i = 0; i < ArrayName.length; i++) {
unduped[ArrayName] = ArrayName;
};
var uniques = new Array;for (var k in unduped) {
uniques.push(unduped);}
return uniques;
};
function selectLayerById(ID, add) {
add = (add == undefined) ? add = false : add;
var ref = new ActionReference();
ref.putIdentifier(charIDToTypeID('Lyr '), ID);
var desc = new ActionDescriptor();
desc.putReference(charIDToTypeID('null'), ref);
if (add) {
desc.putEnumerated(stringIDToTypeID('selectionModifier'), stringIDToTypeID('selectionModifierType'), stringIDToTypeID('addToSelection'));
}
desc.putBoolean(charIDToTypeID('MkVs'), false);
executeAction(charIDToTypeID('slct'), desc, DialogModes.NO);
};
function dupLayers(DocName) {
var desc = new ActionDescriptor();
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
desc.putReference( charIDToTypeID('null'), ref );
var ref2 = new ActionReference();
ref2.putName( charIDToTypeID('Dcmn'), DocName);
desc.putReference( charIDToTypeID('T '), ref2 );
desc.putInteger( charIDToTypeID('Vrsn'), 5 );
executeAction( charIDToTypeID('Dplc'), desc, DialogModes.NO );
};
function selectAllLayers() {
var desc29 = new ActionDescriptor();
var ref23 = new ActionReference();
ref23.putEnumerated( charIDToTypeID('Lyr '), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
desc29.putReference( charIDToTypeID('null'), ref23 );
executeAction( stringIDToTypeID('selectAllLayers'), desc29, DialogModes.NO );
};
function setLayersVisOn(){
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID('Dcmn'), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
var count = executeActionGet(ref).getInteger(charIDToTypeID('NmbL')) +1;
try{
activeDocument.backgroundLayer;
var i = 0; }catch(e){ var i = 1; };
for(i;i<count;i++){
ref = new ActionReference();
ref.putIndex( charIDToTypeID( 'Lyr ' ), i );
var desc = executeActionGet(ref);
var layerName = desc.getString(charIDToTypeID( 'Nm ' ))
if(layerName.match(/^<\/Layer group/) ) continue;
if(!desc.getBoolean(stringIDToTypeID('visible'))){
var list = new ActionList();
list.putReference( ref );
desc.putList( charIDToTypeID('null'), list );
executeAction( charIDToTypeID('Shw '), desc, DialogModes.NO );
}
};
};
function getNamesPlusIDs(){
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID('Dcmn'), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
var count = executeActionGet(ref).getInteger(charIDToTypeID('NmbL')) +1;
var Names=[];
try{
activeDocument.backgroundLayer;
var i = 0; }catch(e){ var i = 1; };
for(i;i<count;i++){
if(i == 0) continue;
ref = new ActionReference();
ref.putIndex( charIDToTypeID( 'Lyr ' ), i );
var desc = executeActionGet(ref);
var layerName = desc.getString(charIDToTypeID( 'Nm ' ));
var Id = desc.getInteger(stringIDToTypeID( 'layerID' ));
if(layerName.match(/^<\/Layer group/) ) continue;
var layerType = typeIDToStringID(desc.getEnumerationValue( stringIDToTypeID( 'layerSection' )));
desc.hasKey( stringIDToTypeID( 'smartObject' ) ) ? SO = true : SO=false;
var blendmode = typeIDToStringID(desc.getEnumerationValue( stringIDToTypeID( 'mode' )));
Names.push([[Id],[layerName],[SO],[blendmode]]);
};
return Names;
};
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