I read AJB's question and replies. some other questions came to me since then. Iīm the photographer's assitant of my father. He owns his own studio, but sometimes we take lighting and camera equipment out. We photopraph paintings and sculptures with 4X5"(210mm lenses) and 6X6. Recently, we went out to photopraph an oil painting that had been restaured. The restauring technique seemed to use some kind of varnish, because there was some intense glow spots, specially over the brush mark endings. I didnīt want to use a polarizer because the contrast of the work could not be affected. The film used was Astia Fufichrome 100, daylight.We used two flash spots pointing to each other making a 90° angle with the painting, as so with the camera. When we develop the slide there where some white reflection spots. It hasnīt ruined the photographer, but i didnīt like it. Was this the best ilumination for this case? What about in general 2D artwork photography, what are most proper lighting techniques to medium and LF? Thank you all in advance.