When I use grass mats for groundwork for the dioramas I make, I often find that the grass surface looks too 'clean'. By this I mean that the surface has grass, either flat, or in clumps and little else. A while ago I wanted to sprinkle a dio grass surface with autumn leaves and after a little bit of thought, I decided to use the contents of used T bags. I opened the bags, spread the contents on paper toweling and let them dry completely. What emerged was not a lot like leaves but more like small clods of dirt. I now sprinkle these on the grass mat, spray with adhesive and the effect, to me anyway, looks quite realistic.