Maysa Rasras Maysa, I don't have research papers. But creativity is not diminished by using ready made art. The first computers came with (free) ready-made art. With internet access came free "clip-art". The two popular vector software packages have (since 1995) shapes, filters, multi-color gradients graphic libraries. I suggest ready-mades only make you appear to have drawing skills. Use them and you can explore more ideas.