Well - I'd recommend taking that heavy gauze or whatever you call it, and glueing some "leaf" material to it. For leaves I'd take black tea or pecil shavings from an automatic sharpener (one with a crank). Here, let me show you what I managed to do this way - with this camouflaged fantasy sniper:
I took pencil shavings and some "foliage" I think from Woodland Scenics or Faller
Hope it helps, have a nice day
Paweł