This option improves rendering speed (or, in other words, reduces noise and improves antialiasing). It is equivalent to the "Tent" filter with width 2.0 in the sense that they eventually converge to the same image.
How to enable it?
The High Quality filtering is enabled by default in all new scenes.
When opening older scenes, the image filter will stay consistent previous renders. It can be optionally enabled.
In 3ds Max, You can find the High Quality image filter in the System tab of the Render Setup window:
In Cinema 4D, you can find the High Quality image filter in the Frame Buffer Settings tab of the Render Settings window:
Examples
1. Fine textures
Tent filter (the old method):
Crop:
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Full image:
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High Quality filter (the new method):
Crop:
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Full image:
(Click to open in new tab and enlarge)
[Click here for an interactive comparison]
Note that the differences are subtle, however:
- The pattern visible on the fabric in darker (more noisy) areas is easier to see with the new filtering method.
- There is generally less perceivable noise with the new filtering method.
- Some areas are not affected at all (where there are sharp edges and no visible noise).
2. GI noise and depth of field
Tent filter (the old method):
Crop:
(click to open in new tab)
Full image:
(Click to open in new tab and enlarge)
High Quality filter (the new method):
Crop:
(click to open in new tab)
Full image:
(Click to open in new tab and enlarge)
[Click here for an interactive comparison]
The differences are again subtle, but can be seen in:
- The darkest places where the GI noise is mostly visible. Note that with the new method, the noise is "softer" and generally appears more natural to the eye.
- Bright highlights are softer and look more natural (the right side of the railing at the top-center of the image, close to the bright balcony door).
- Areas heavily affected by depth of field are softer and less noisy.
- Some areas are not affected at all (where there are sharp edges and no visible noise).
Limitations
Currently, one limitation which we would like to remove, is that only the Corona High Quality denoiser works with high quality pixel filtering. The AI denoisers (neither NVIDIA nor Intel) cannot be used with high quality filtering.
See: Error message: Using high quality pixel filtering with AI denoising is not supported.