BRDF-Shop: An Artistic Tool for Creating Physically Correct BRDFs
We present an interface for quick and intuitive development of arbitrary, but physically correct, Bi-directional Re?ectance Distribution Functions, or BRDFs. Our interface, referred to as BRDF-Shop, provides artists the ability to create a BRDF through positioning and manipulating highlights on a spherical canvas. We develop a novel mapping between painted highlights and specular lobes of an extended Ward BRDF model. The implementation of BRDFShop utilizes programmable graphics hardware to provide a realtime visualization of the material on a complex object in environment lighting.