The High Quality Image Filter is generally preferred over the 2.0px Tent filter because it reduces noise and improves anti-aliasing ( 3ds Max | C4D ) faster, especially early in the rendering process. While both filters produce virtually identical images once rendered to final quality, the High Quality filter reaches a usable result significantly sooner.
How to enable it?
The High Quality Image Filter is enabled by default in all new scenes.
When opening older scenes, the image filter will stay consistent with previous renders, but it can be manually 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
High Quality Filtering |
Tent Filtering (2px) |
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Note that:
- With the High Quality Filtering, more passes are rendered within the same given time resulting in better overall image quality.
- The pattern visible on the fabric is generally easier to see with High Quality Filtering.
- There is less perceivable noise with High Quality Filtering.
- As more passes are rendered, the differences between High Quality and Tent filtering become less obvious.
2. GI Noise
High Quality Filtering |
Tent Filtering (2px) |
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Note that:
- With the High Quality Filtering, more passes are rendered within the same given time resulting in better overall image quality.
- With High Quality Filtering, the noise is "softer" and generally appears more natural to the eye.
- As more passes are rendered, the differences between High Quality and Tent filtering become less obvious.
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.