game-editor.com

it would be nice if we could choose the distance between infinite actors.We could use it to make clouds or something like that.

I agree that this would be a nice feature to have in some instances, but until we do get it, here's a way to do it by editing the image:

(screenshots taken in GIMP)
Of course, you can use a even more transparent pixel than the one I used, it was only that visible so you could see it.