Batch merge/load images from 2 directories as layers

@Phi23530073ptf1 

Try this modified version:

/*
Combine PNG files from 2 input folders to Layered PSD.jsx
https://community.adobe.com/t5/photoshop-ecosystem-discussions/batch-merge-load-images-from-2-directories-as-layers/td-p/12804714
Stephen Marsh, v1.2 - 24th July 2024
*/

#target photoshop

    (function () {

        if (app.documents.length === 0) {

            try {

                // PNG image input folder 1
                var folder1 = Folder.selectDialog("Select the 1st PNG image folder:");
                if (folder1 === null) {
                    alert('Script cancelled!');
                    return;
                }

                // PNG image input folder 2
                var folder2 = Folder.selectDialog("Select the 2nd PNG image folder:");
                if (folder2 === null) {
                    alert('Script cancelled!');
                    return;
                }

                // Validate input folder selection
                var validateInputDir = (folder1.fsName === folder2.fsName);
                if (validateInputDir === true) {
                    alert("Script cancelled as both the input folders are the same!");
                    return;
                }

                // Limit the file input formats
                var list1 = folder1.getFiles(/\.(png)$/i);
                var list2 = folder2.getFiles(/\.(png)$/i);

                // Alpha-numeric sort
                list1.sort();
                list2.sort();

                // Validate that folder 1 & 2 lists are not empty 
                var validateEmptyList = (list1.length > 0 && list2.length > 0);
                if (validateEmptyList === false) {
                    alert("Script cancelled as one of the input folders is empty!");
                    return;
                }

                // Validate that the item count in folder 1 & 2 matches
                var validateListLength = (list1.length === list2.length);
                if (validateListLength === false) {
                    alert("Script cancelled as the input folders don't have equal quantities of images!");
                    return;
                }

                // Output folder
                var saveFolder = Folder.selectDialog("Select the folder to save to...");

                // Save and set the dialog display settings
                var savedDisplayDialogs = app.displayDialogs;
                app.displayDialogs = DialogModes.NO;

                // PSD save options
                var psdSaveOptions = new PhotoshopSaveOptions();
                psdSaveOptions.embedColorProfile = true;
                psdSaveOptions.alphaChannels = true;
                psdSaveOptions.layers = true;

                // Perform the stacking and saving
                for (var i = 0; i < list1.length; i++) {
                    var doc = open(list1[i]);
                    var docName = doc.name.replace(/\.[^\.]+$/, '');
                    app.activeDocument.activeLayer.name = folder1.displayName;
                    placeFile(list2[i], 100);
                    try {
                        app.runMenuItem(stringIDToTypeID('rasterizePlaced'));
                    } catch (e) { }
                    app.activeDocument.activeLayer.name = folder2.displayName;
                    doc.saveAs(new File(saveFolder + '/' + docName + '.psd'), psdSaveOptions);
                    doc.close(SaveOptions.DONOTSAVECHANGES);
                }

                // End of script
                app.displayDialogs = savedDisplayDialogs;
                app.beep();
                var listCount = list1.length;
                alert('Script completed!' + '\r' + listCount + ' Layered PSD files saved to:' + '\r' + saveFolder.fsName);

            } catch (err) {
                while (app.documents.length > 0) {
                    app.activeDocument.close(SaveOptions.DONOTSAVECHANGES);
                }
                alert("An unexpected error has occurred!" + "\r" + e + ' ' + e.line);
            }

        } else {
            alert('Please close all open documents before running this script!');
        }

        ///// FUNCTIONS /////
        function placeFile(file, scale) {
            try {
                var idPlc = charIDToTypeID("Plc ");
                var desc2 = new ActionDescriptor();
                var idnull = charIDToTypeID("null");
                desc2.putPath(idnull, new File(file));
                var idFTcs = charIDToTypeID("FTcs");
                var idQCSt = charIDToTypeID("QCSt");
                var idQcsa = charIDToTypeID("Qcsa");
                desc2.putEnumerated(idFTcs, idQCSt, idQcsa);
                var idOfst = charIDToTypeID("Ofst");
                var desc3 = new ActionDescriptor();
                var idHrzn = charIDToTypeID("Hrzn");
                var idPxl = charIDToTypeID("#Pxl");
                desc3.putUnitDouble(idHrzn, idPxl, 0.000000);
                var idVrtc = charIDToTypeID("Vrtc");
                var idPxl = charIDToTypeID("#Pxl");
                desc3.putUnitDouble(idVrtc, idPxl, 0.000000);
                var idOfst = charIDToTypeID("Ofst");
                desc2.putObject(idOfst, idOfst, desc3);
                var idWdth = charIDToTypeID("Wdth");
                var idPrc = charIDToTypeID("#Prc");
                desc2.putUnitDouble(idWdth, idPrc, scale);
                var idHght = charIDToTypeID("Hght");
                var idPrc = charIDToTypeID("#Prc");
                desc2.putUnitDouble(idHght, idPrc, scale);
                var idAntA = charIDToTypeID("AntA");
                desc2.putBoolean(idAntA, true);
                executeAction(idPlc, desc2, DialogModes.NO);
            } catch (e) { }
        }
    }());