Flat fielding without a big white card...

Our take

Capturing the true essence of larger artworks can be a challenge, particularly when it comes to achieving even lighting across the canvas. Traditionally, flat fielding with a large white card is the go-to solution, but this isn't always feasible. In my recent experience, I placed a ColorChecker Classic in the center and corners of the painting, then utilized gradients in Photoshop to balance the light. This process proved to be intricate and not entirely effective.

I reproduce paintings with photography and I'm running into a problem... The larger the artwork the harder it is to get the lighting even right across the painting. The usual solution is to use flatfielding with a huge piece of card, held up in front of the artwork. Quite often this isn't possible so on my last capture I resorted to putting a colorchecker classic as a reference in the centre and in all 4 corners of the painting, then using gradients in photoshop so even out the light as best I could. It was fiddly and even then it was tricky to balance the light effectively.

Does anyone know of a plugin for photoshop or a an efficient technique to flatfield in this way?

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