Yep, what Pete said. :) If the plant objects have multiple parts, you can open the group in the hierarchy browser (lower right) and select each sub-object individually to add a material. If the plants are a single piece, double-click each one and check the editing options. There may be a choice enabled to split them. If so, click on "Split" and then the object will have multiple parts to work with. Sometimes a 3DS object will be in a single piece but still have multiple texture areas. Check for that by opening the Material Summary and see what materials are showing. If there are multiple areas, they may all be gray or black, but they will likely have different names and be applicable to different areas of the object. A good idea is to use basic flat colors as the initial material. Doesn't matter what colors. Make one part blue, another part green, another part purple...just so you can visually tell each color apart easily. Then you will be able to get a better look at the model, seeing where each material is applied to. This'll help define each material, whether it's leaves or stem or flower petal, etc. Once you can see which is which, then you can select more appropriate materials. Another tip: when you've set up the plant with materials, save it as a VOB object. Now all the materials are already in place the next time you want to use that model. :)