I'm just curious how we can get the BRDF of each material? Is this a result by doing experiment? Or it's a mathematical result?(Sorry the below redundant comments are duplicate because of the Internet problem when I send them. So I delete them)
I'm just curious how we can get the BRDF of each material? Is this a result by doing experiment? Or it's a mathematical result?(Sorry the below redundant comments are duplicate because of the Internet problem when I send them. So I delete them)