reflectance properties
Technical term in computing and optics for the reflective characteristics of a surface or material.
We need to measure the reflectance properties of this material.
Reflectance properties greatly affect rendering quality.
反射率 is a specific numerical measure of reflectance (reflectance ratio), while 反射特性 refers to the broader set of reflective properties.
Compound of 反射 (reflection) and 特性 (characteristics, properties).