ArtMetal

The last time I went to a jeweler's conference several people were high on something called a cloud dome, which effectively diffuses the light.

http://www.bellaonline.com/articles/art30856.asp

However, that does not explain why the colors came out so far off. It may be that your digital camera is confused by the limited colors in the photo, read the manual for possible help.

As someone else said, learn Photoshop

Richard

http://www.fergusonsculpture.com
Sculptures in copper and other metals