So it's pretty simple, Isabelle.
Nature knows no standards, as they have with all freedoms.
- Standart grass mats have a fiber length of 3 to 4 mm.
Application for normal grass surfaces, regardless of the season and dyeing the mat.
- Long grass mats have about 6-10 mm fiber length.
Application for wild meadows with high ground cover
- Ground cover from fabric mats (Rakelpflanten, flowers)
- Tufts of grass in different sizes and colors
application; for alone standing plants (steppe, deserted settlement)
Importantly, as Jörg already wrote;
Matt surfaces Comminute (do not tear cut), parts with paper side in water to soak (paper or cardboard is soft) and can be connected better anmodelieren with glue on surface and figures.
After all is well glued and dried well, I empfäle to rework the surface of the lawn with water color.