![]() ![]() This is generally accomplished by manipulating a cubemap environment map (taken from the real world or generated from a 3D scene) such that we can directly use it in our lighting equations: treating each cubemap texel as a light emitter. IBL, or image based lighting, is a collection of techniques to light objects, not by direct analytical lights as in the previous chapter, but by treating the surrounding environment as one big light source. Diffuse irradiance PBR/IBL/Diffuse-irradiance
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