Hmm, just had an idea you might want to try out:
Suppose you build a profile (RGB I guess as your images probably are in RGB) on some paper without optical brightener. Then build a profile in profilemaker, but with a white point (measured from share) of your oil lamp dummy.
Then in Photoshop, using View>Proofsetup> custom Preserve colour numbers.
Dear Thomas
Or another but low tech idea.....Tony could make a print to the same scale as one of the wall paintings, illuminate it with his chosen light source and then photograph it with his digital camera at whatever settings he felt appropriate, or with film filtered in different ways of course.
Cheers
Richard -- Richard Kenward www.precision-drum-scanning.co.uk
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