12 votes
Accepted

Anti-aliasing / Filtering in Ray Tracing

There is a great paper from 2006 on this topic, Filter Importance Sampling. They propose your method 2, study the properties, and come out generally in favor of it. They claim that this method gives ...
Nathan Reed's user avatar
9 votes
Accepted

What is the fundamental reasoning for anti aliasing using multiple random samples within a pixel?

From a signal processing point of view, you're sampling a continuous-domain signal, and you need to filter it to get rid of frequencies beyond the Nyquist limit. It's that filtering that leads to ...
Nathan Reed's user avatar
7 votes
Accepted

Do animation studios like Pixar, Dreamworks, and Disney use super-sampling?

Super-sampling for ray-tracing doesn't just mean rendering an area at higher resolution and then downscaling the finished image: in fact, this simplest super-sampling technique is really not effective ...
Dan Hulme's user avatar
  • 6,810
4 votes

What is the fundamental reasoning for anti aliasing using multiple random samples within a pixel?

You are in fact doing both things. You are integrating the area and because your result is still discrete samples you are reconstructing the signal to make it continious function. Therefore the higher ...
joojaa's user avatar
  • 8,437
1 vote

Ray tracing Supersampling patterns : pre-computing them?

It's common to precompute some of the sampling. The most modern approach is probably to use a blue noise pattern. Have a read through here (I belive it also has some precomputed patterns and source ...
Peter's user avatar
  • 529
1 vote
Accepted

MSAA performance with forward shading

There is nothing surprising about this. The biggest cost of multisampling is that you're rendering to larger buffers and therefore require more bandwidth to cover the same pixel-space area. This is ...
Nicol Bolas's user avatar
  • 9,782
1 vote
Accepted

Multiple samples per pixel and texture blurring

In signal processing, it is well-understood that you cannot accurately reproduce an analog signal of higher frequency than half the frequency of your digital sampling rate. That's just how the math ...
Nicol Bolas's user avatar
  • 9,782

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