[Rosim_in_BR]

Following Ross' comments, I'd add two small hints that may help: first do not position the object too close to the background; by doing so you avoid having its texture in focus together with the object being photographed. Second, turn off the flash device. It produces hard shadows. If you don't have appropriate spot lights, use natural light, taking your shots especially in the morning when the sunlight has better proportion of blue, thus allowing good balance between the so-called hot and cold colors (your camera maker probably has conditioned it to this light). Also, late in the afternoon(longer wave length, tending to golden/red) is an interesting option for good photos.