![]() ![]() The problem is that just randomly picking a direction to bounce in kinda sucks because then you have to have lots and lots and lots of samples to converge on the "true" values. The more samples you take and then average out, the closer this noise converges on the "correct" answer. This is why 3D renders are so noisy, because if you only have 1 sample one pixel might bounce off and hit a light (and gets really light), while the neighbour pixel bounces off into space (and is rendered as black). Click to expand.Whenever a ray hits an object, you have to bounce it again in a new "random" direction. ![]()
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