Texture reproduction is actually an easier problem than color reproduction, and is pretty much solved at less than a $5000 cost. Color is hard partially because people want the painting to look the same under all lighting conditions; under just one, we can solve the problem pretty well, but under all, we nearly need to use the same materials as were originally used. Needless to say, the cost of reproductions scales with the quality, and can become quite high.
Texture reproduction is actually an easier problem than color reproduction, and is pretty much solved at less than a $5000 cost. Color is hard partially because people want the painting to look the same under all lighting conditions; under just one, we can solve the problem pretty well, but under all, we nearly need to use the same materials as were originally used. Needless to say, the cost of reproductions scales with the quality, and can become quite high.
I wonder if enough people would go to a museum of high quality reproductions to make it worthwhile.