Page History

The options available in this tab will allow you to set additional behavior for the Corona VFB, including the Image filter.

UI Path: ||Render settings window|| > Corona > Frame buffer settings tab

Clear VFB in between renders – When enabled, the frame buffer is reset to black before each rendering. When disabled, the last render stays on and is gradually replaced by the new one.

Render stamp – When enabled, text with render information overlays on the bottom right corner of the rendered output. You can click the little > button before the checkbox to see the list of all available %-variables you can use.

%ptp - Performance: Preprocessing time (in milliseconds)
%ptg - Performance: Geometry preprocessing time (in milliseconds)
%pts - Performance: Secondary solver precomputation time (in milliseconds)
%ptd - Performance: Denoising time (in milliseconds)
%pt - Performance: Total elapsed time
%pr - Performance: Rays per second
%ps - Performance: Rays per sample
%pp - Performance: Passes
%pe - Performance: Noise level
%sl - Scene: Number of light primitives
%so - Scene: Number of objects
%su - Scene: Number of unique primitives
%sd - Scene: Number of displacement primitives
%si - Scene: Number of instanced primitives
%c - CPU name
%ct - Number of CPU thread(s)
%bn - Corona build name
%b - Corona build date
%d - Current date/time
%h - Current time
%f - Currently rendered filename
%n - Actual frame number
%o - Output filename
%v - Current camera name
%i - This computer name
%mc - Memory currently used by Corona
%mcp - Peak memory used by Corona
%mp - Virtual memory currently used by Cinema 4D + Corona
%mpp - Peak virtual memory used by Cinema 4D + Corona
%ms - Virtual memory currently used by the system
%bpn - Corona plugin build name

Type – The image pre-filters suppress Moiré patterns and other artifacts by slightly blurring the image. Most filters produce visually almost equal results.

Available filter types are:

High Quality – This filter produces better anti-aliasing and DoF than other filters. It does not work with AI denoising.
Box – This filter has the most significant blurring of all the filters.
Tent – This filter offers a good tradeoff between blurring and sharpness.
Symmetric tent – This filter is a variant of the tent filter with bigger diagonal blurring.
Parabolic – This filter has the second most significant blurring of the filters.
Hann – This filter has low diagonal blurring and a smaller tail than the other filters.
Blackman-Harris – This filter is the sharpest, resulting in the least blurring of all the filters (except for None).
None – This option disables the filtering entirely, resulting in a perfectly sharp image.

Width [px] – The filter radius in pixels. A larger value slightly blurs the image to improve anti-aliasing and removes the Moiré effect. The default value of 2.0 works fine in most cases.

Highlight clamping – Clamps all samples to this maximum value before they are written into the frame buffer. This can help to reduce noise and improve anti-aliasing around bright light edges at the cost of bias. Setting the value too low results in visibly clamped highlights. Set to 0 to disable for unbiased, highest-quality output.