I have a Bosch 12" sliding mitre saw in my wood shop. It's loud, it's noisy, and it does the job quite nicely. It also throws a lot a dust around. It comes with a dust bag, which captures maybe 10 percent of the ejected dust...at most. [I think of the bag as more of a "dust sampler," as it merely samples some of the dust...but I digress.] The remaining 90 percent of the sawdust gets thrown toward the rear, covering everything along that part of the wall and dropping down on the floor behind the stand, where it accumulates and is hard to get at.

Sure, there are dust hoods available for these machines. But they are huge, cumbersome, and due to their geometry, would require that I move my saw forward to provide room at the rear. Since my saw already takes up a sizable footprint in my shop, I didn't like the idea of more encroachment. Those big dust hoods also require an enormous amount of air movement to effectively draw dust from such a large area - well beyond the capabilities of my humble little dust collector. I just wanted something that would catch most of the particles that shoot rearward, so that I could easily suck them up later with a dust collector. Something that didn't get in the way of other things in the vicinity.

I had a brain-fart. And here it is. The supplies cost less than 10 bucks at my local Menard's, and it took about an hour to install. The catcher is simply a cheap, 4-mil vinyl roller window shade, and some mounting brackets. I just bought one off-the-shelf, 55 inches wide by 60 inches long, which is more than adequate for catching dust, even at left and right miter angles. And if it ever gets damaged, I can easily buy another one.

Occam's Razor: the simplest solution is usually the best solution.

Miter dust catcher, set up. This can also double as a screen if you happen to have a slide projector in your shop. ;)	Don't forget to allow some slack in the shade to accommodate the slider arm movement. Of course, if your saw is not a slider, this is a moot point.
I used a couple of spring binder clips to hold down the end of the shade.	When I'm not using the saw, I can pull up the shade and have access to all the other crap that covers that wall.