You probably know this, but it gets even worse. Paint can be applied in many translucent layers, and the reflectance of paint materials can differ a lot. The

You probably know this, but it gets even worse. Paint can be applied in many translucent layers, and the reflectance of paint materials can differ a lot. The color therefore also changes depending on how you look at the painting and under what lighting conditions. The same goes for objects, and photos typically capture only a limited subset of this.