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What kind of lighting do I use to find and see the hidden pictures or writings in a Shepard knock down ceiling?
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Sorry. What is a Shepard knock down ceiling?
Hi Joy, Do you mean the pictures or writings are behind the paint? If so, you might have to find the appropriate wavelength of light, may be NIR or IR that could give more information, or try using bandpass filters for certain wavelengths to find it. Thanks!