This matches with experience in the project, and comparing hemisphere and importance sampling
letrangg
ah, since the incoming ray sometimes doesn't hit the light source, the whole area we integrate over is just dark and noisy. Each pixel could or could not have some amount of light shining on it based on the ray cast from each pixel. Meanwhile if we only integrate over the area of light, the integrated result will be less noisy
This matches with experience in the project, and comparing hemisphere and importance sampling
ah, since the incoming ray sometimes doesn't hit the light source, the whole area we integrate over is just dark and noisy. Each pixel could or could not have some amount of light shining on it based on the ray cast from each pixel. Meanwhile if we only integrate over the area of light, the integrated result will be less noisy