a Script or Batch to Vertically Combine Multiple Images

@hamigua – I made a quick edit to the script that I offered in the topic that you linked to:

/*
Combine Images Vertically.jsx
https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-merge-3-images-togehter-stacked-in-a-batch/td-p/13922876
Based on:
https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-combine-images-horizontally-via-batch/td-p/12716190
Stephen Marsh, v1.0 - 9th July 2023
*/

$.evalFile(File(app.path + '/Presets/Scripts/Load Files into Stack.jsx'));
var newHeight = app.activeDocument.layers.length * 100;
canvasSize(newHeight);
align2SelectAll('AdBt');
app.runMenuItem(stringIDToTypeID('selectAllLayers'));
distributeVertically();


// Functions

function distributeVertically() {
	var s2t = function (s) {
		return app.stringIDToTypeID(s);
	};
	var descriptor = new ActionDescriptor();
	var reference = new ActionReference();
	reference.putEnumerated( s2t( "layer" ), s2t( "ordinal" ), s2t( "targetEnum" ));
	descriptor.putReference( s2t( "null" ), reference );
	descriptor.putEnumerated( s2t( "using" ), s2t( "alignDistributeSelector" ), s2t( "ADSDistV" ));
	executeAction( s2t( "distort" ), descriptor, DialogModes.NO );
}

function canvasSize(height) {
	var s2t = function (s) {
		return app.stringIDToTypeID(s);
	};

	var descriptor = new ActionDescriptor();

	descriptor.putUnitDouble( s2t( "height" ), s2t( "percentUnit" ), height );
	descriptor.putEnumerated( s2t( "horizontal" ), s2t( "verticalLocation" ), s2t( "top" ));
	executeAction( s2t( "canvasSize" ), descriptor, DialogModes.NO );
}

function align2SelectAll(method) {

   app.activeDocument.selection.selectAll();

   var desc = new ActionDescriptor();
   var ref = new ActionReference();
   ref.putEnumerated(charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt"));
   desc.putReference(charIDToTypeID("null"), ref);
   desc.putEnumerated(charIDToTypeID("Usng"), charIDToTypeID("ADSt"), charIDToTypeID(method));
   try {
      executeAction(charIDToTypeID("Algn"), desc, DialogModes.NO);
   } catch (e) { }

   app.activeDocument.selection.deselect();

}

The script presumes that the height of all layers is the same.

@hamigua 

How many images in each set to combine into a single image?

If you found solutions for horizontal stacks, then they should be able to be easily modified into vertical.

The following current topic stacks sets of 3 images into a vertical strip:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-merge-3-images-togehter-stacked-in-a-batch/td-p/13922876