Rendering without antialiasing

[superrune]

Hi, I am trying to render images from V-Ray that go into Google Seurat. Seurat requires that all passes, even beauty, are completely free from antialiasing. I haven't found a way to do that in V-Ray, do anyone know if that is possible? Ideally, there should be no aliasing between pixels, but still enough samples to render a fairly noise-free image. I have tried turning off the Image filter, but that doesn't work. Even though I turn off filtering in V-Ray, there's still antialiasing applied through a box filter. And if I use the "VRayTriangleFilter" or the "VRayBoxFilter" with a size less than 1.0, the image is rendered as just dots. Any pointers will be much appreciated!

[Buck]

this is probably not ideal, but it might work. If what you're rendering renders fairly quick, you could render it much larger than needed, and then scale it down with no filtering. I'm not sure how many times larger you would need to render, but it might work.

[^Lele^]

In simplistic terms, one camera ray and many secondary ones (i.e. high MSR, AA fixed at 1 subdivs) could get you somewhere (see attached: 1024 msr, bucket rendering, no max AA), without the need to disable filtering.
However as soon as you get sub-pixel details, one camera ray per pixel is going to fall apart (attached, hair on the cylinders, and the alpha).

The scaling method Buck mentioned seems to work quite damn well as well (with impulse, or nearest neighbour, neither of which interpolates), but the results are subtly different from direct rendering (attached the jpgs scaled from a 2160p render with proper AA to 1080p).
EDIT: You would get better results with the rescaling technique if you went higher for initial resolution, f.e. 4x.

[superrune]

Lele, Daniel, thanks for answering! The scaling method sounds interesting, but I think that even though it gives the appearance of an aliased render there will still be pixels that have a blend between two different objects - which in turn will cause the Seurat calculations to fail. Render artifacts are not important in this case, it is much more important that each pixel corresponds to a single object only in the primary rays. But I will try the no max AA method and see where that leads me Thanks!

[caypiranha]

Max´s Preferences -> Rendering -> Background: don´t Antialias against Background
haven´t tested it, but sounds something like might help - or not - maybe you can try it... =)
(I just meet this feature wile setting up Max 2023 and remind your post here)