Just some pointers that may help bring out the signature. Too much light will wash out the details. Natural light is best, but not too direct. You will also need a tripod and a manual setting on your camera. Set the f stop to largest number, this will make it impossible to hand hold and use the timer or a shutter release, so as to not move the camera. Long Exposure with large depth of field, and just a touch of natural light. I'm from the old school days of photography before auto exposure and focas, these functions will only generalize the exposure. Hope this will help, Any questions you may have just feel free to ask.