Sorry everyone that it's taken me so long to get these pictures. I was trying to figure out a better way to capture what it would look like being thrown on a house. I live in an apartment so the best I could do is throw it on the wall at about 5ft and have my girlfriend stand next to it for size comparison.
As I played with the different diffraction gratings I got a few pictures to show how dramatic a difference small changes make. Even the order in which you put the gratings.
Huge shout out to Tmack because with out the gratings this would have been impossible!
This first picture is of 2 gratings one line and one matrix.
This next picture is of the same set up, only the order of the gratings changed.
In this picture I just rotated the gratings a bit and threw in an organic non-square object (my girlfriend) to show what the projected dots would look like.
If you look at the laser projection as a whole you can see the pattern quite well. But if you imagine that you would only realistically see one cluster on something the size of a garage door the "pattern" of each cluster looks fairly random. (Except for the one photo, but a small turn of the grating fixes that)
So I thought what would happen if I added more dots... A lot more. this is what I got.
And a small adjustment gave me this.
Not sure if this answered your questions or not, but it was a lot of fun trying to force the grating to look as asymmetrical as possible.