Paper2D: Does it matter if texture is power of 2?

Unreal Engine Rendering
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#1

I was importing a lot of textures into my paper2D project, and I noticed that I would often get the error: _.png is not a power of two. Non power of two textures are never streamed and have no mimaps. Proceed?"

How much does this impact performance? Could this be why I find my paper2D sprites to have choppy rendering? Are other paper2D developers using power of 2 textures?

And if I wanted to make it a power of 2 png, how would I go about doing this? I tried following the example here, but it would end up stretching the pngs which made them look weird. Do I have to add white space to every png to make them powers of 2, then import into unreal, and then crop the white space out again? Is there a way I can do this to all the pngs at the same time so I don’t have to go one by one?

#2

I read somewhere that doesn’t apply for sprite sheets and can be ignored.

#3

or if you want to stick with photoshop, you could probably batch process it with their version of javascript, with something like the following:

//http://stackoverflow.com/questions/10257646/photoshop-script-resize-images-in-folder-dialog-box/10304886#10304886
//http://stackoverflow.com/questions/11538242/resize-batch-images-in-photoshop

var inputFolder = Folder.selectDialog("Select a folder to process");

var fileList = inputFolder.getFiles("*.PNG"); 

for(var i=0; i<fileList.length; i++) 
{
    var doc = open(fileList[i]);
	var new_width = doc.width;
	var new_height = doc.height;

	new_width-=1;
	new_width |= new_width >> 1;
	new_width |= new_width >> 2;
	new_width |= new_width >> 4;
	new_width |= new_width >> 8;
	new_width |= new_width >> 16;
	new_width+=1;
	
	new_height-=1;
	new_height |= new_height >> 1;
	new_height |= new_height >> 2;
	new_height |= new_height >> 4;
	new_height |= new_height >> 8;
	new_height |= new_height >> 16;
	new_height+=1;

	doc.resizeCanvas(new_width, new_height);
	
	doc.save();
	doc.close();

}