Metal edge reflectance
Dimensions would benefit from proper edge reflectance for metals. Right now once something is fully metallic, the reflection color is uniform without regard to incidence angle. But that's now how metals are in the real world, the metal's color shifts to a desaturated version of the primary color. This is something many applications do. the edge reflectance follows the fresnel equation with something like 1.3 IOR for curve shape. Without this metals look flat and incorrect to the eye of someone who does 3D work and knows about this physical property.