aright i think i got it now! thanks eq and the others! follow up question: a big difference with the pbr workflow is that you cant pick the diffuse values yourself anymore you have to base it somewhat on scanned data and such. why? if i paint a wall in real life, i get to pick whatever diffuse i want right? why is this not…
so im trying to understand pbr, and make it relatable to the real world, and im stuck on the energy conservation theory. it says, the how much reflective light a material has, is directly proportional to how little diffuse light it has. so a highly reflective material has a darker diffuse, and a non reflective have…
A big advantage of PBR is that materials will look accurate whatever their lighting conditions. This was not always the case before PBR so textures were often custom made to match the lighting they're intended to be used in. Obviously Earthquake wrote the article, but I'd guess he was referring to the real world reference…
".... is this correct?" Yep. "if so, the maps we use in a pbr workflow would be, diffuse; the colour of the light after it bounced around underneath the surface gloss: the angle of specular reflections (microsurface) metalness: amount of specular vs diffuse is this also correct?" A PBR system doesn't have a specific set of…
The concept of energy conservation states that a given surface can not reflect more than 100% of the light that hits it. This is logical and physically grounded in reality, how could something reflect more than 100% of the light that hits it? It would have to generate photons of its own to do such a thing. So, if you have…
alright i read those links, so here is my visaulisation to make sure i understand; 1. specular 2. angle of the specular reflection, based on the glossiness of the surface. if its wide its more spread out and thus weaker (energy conservation) 3. diffuse different materials have different amounts of specular reflections and…
It's a misconception that you can't pick your diffuse/albedo value in a PBR system. Diffuse values will vary heavily for insulators depending on what color a material is. If you find a measured diffuse value for say, red paint, that doesn't you have to use that value for every type of paint, obviously blue paint or black…