Optics-2022 : Filters : S_BleachBypass
S_BleachBypass
Description
Simulates a film process in which silver is not removed from the negative. The result has increased contrast and reduced color saturation.
The S_BleachBypass filter comes from the Emmy award winning Boris FX Sapphire filter set.
Category
Film Lab.
Controls
Presets
To select a preset, pick one from the Presets window.
Amount
Controls the intensity of the effect by interpolating between the original source and the result.
Soft Focus
If positive, a soft focus effect is also applied. Increase for a broader soft focus look.
Sharpen
The amount of post−process sharpening applied.
Saturation
Scales the color saturation. Increase for more intense colors. Set to 0 for monochrome.
Scale Lights
Scales the result by this value. Increase for a brighter result.
Offset Darks
Adds this gray value to the darker regions of the result. This can be negative to increase contrast.
Grain Amp
Scales the amplitude of the film grain that is added to the result. Set this to 0 to disable all grain.
Grain Parameters
Grain Amp Red
Scales the red grain amplitude.
Grain Amp Green
Scales the green grain amplitude.
Grain Amp Blue
Scales the blue grain amplitude. Note that grain is added and subtracted from the image, so for example, increasing Grain Amp Blue will amplify both the blue and yellow speckles.
Grain Amp Darks
The relative amount of grain applied to the darkest regions of the image, per channel. This defaults to less than 1 because dark areas usually have less grain than midtones.
Grain Amp Brights
The relative amount of grain applied to the brightest regions of the image, per channel. This defaults to zero because bright areas usually have less grain than midtones. Note that highly saturated colors can be affected by both Grain Amp Darks and Grain Amp Brights because they are dark in some color channels and bright in others.
Grain Blur
The grain is smoothed by this amount. Increase for coarser grain.
Grain Blur Red
The relative blur amount for the red grain.
Grain Blur Green
The relative blur amount for the green grain.
Grain Blur Blue
The relative blur amount for the blue grain.
Grain Mono
When enabled, the same grain pattern is used for the red, green, and blue channels. To make truly monochrome grain you should also set Grain Amp Red/Green/Blue equal to each other, make sure Midtone Pos Red/Green/Blue are equal, and if GrainBlur is positive also set Grain Blur Red/Green/Blue to be equal.
Grain Seed
Initializes the random number generator for the grain generation. The actual seed value is not significant, but different seeds produce different grain patterns and the same value should give a repeatable pattern.
Scale Colors
Scales the color of the result.