Ola Spiritseye
Well one thing you really have to look out for when you use branches that it`s all good looking in scale. You don`t want to big branches or it will look odd. I myself have done some tests with reeds and grasses for Camo and the results were quite ok actually. I have some pics of the reed test I did.
I sadly don`t have pics of the various grasses I tested but they are about the same results as the reed technique
Another example of splendid camo was done on this Mobelwagen from Keenan wich he made for the Remember Market Garden Campaign. I don`t know exactly what he used but to me it also looks like it is some sort of grass. If you PM him I`m sure he will explain what exactly he used.
Another few examples of using grass for Camoflage is from a ducth modeler with the Name Jochem Kleerebezem
Here he uses Asparagos for Camo
Another sort of camo but then with Moss still from Jochem Kleerebezem
Etc. Etc. Plenty of options for camo I hope this is of some help to you.
Greetz Robert