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V-Ray Lens Effects simulates real-world camera lens effects such as bloom and glare. The plug-in uses a fast multi-threaded technique to compute the result and provide immediate update in New V-Ray VFB. V-Ray Lens Effects are applied in the effectsResult channel together with other post effects executed over the RGB rendered image.

The Lens Effects layer is accessible from the Layers panel in the new VFB and can be activated when the lens effects are enabled. It can be blended with the rest of the layers in the redesigned VFB.

Additionally, V-Ray includes a standalone Filter Generator Tool for composing custom lens filters.

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Lens Effects layer can be disabled from the visibility icon ().

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||V-Ray Frame Buffer|| > Layers > Lens Effect

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Lens FX controls

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Enable bloom/glare effect – Enables the V-Ray Lens Effects.

Size – Specifies the size of the filter as percentage of the image's diagonal. See the Size example below.

Intensity – Multiplier for the bloom/glare source bright pixels. Increasing the value can boost the effect by simulating up to 20 times brighter source. Values lower than 1 can be used to produce subtle bloom/glare from overbright sources. See the Intensity example below.

Bloom – Controls the blend between bloom and glare. A value of 1 forces bloom to be applied to full extent and without any glare. A value of 0 removes the bloom completely and applies only glare. Values in-between blend the two effects proportionally. See the Bloom/Glare example below.

Threshold – Sets a minimum value for the rendered pixels to be considered as lens effects source. The Bloom/Glare effect will be generated only regarding pixels with larger value than the specified threshold.

Rotation – Rotates the final result effect, regardless of this is a filter image or a procedurally created one. 

Saturation – When the value is set 0, the effects use the original hue of the bright pixels to create bloom and glare. Larger values intensify the hue set with the Cold/Warm option. See the Cold/Warm & Saturation examples below.

Hardware Accelerated – Enable to calculate lens effects on the GPU. When multiple devices are present, V-Ray will prioritize the best one available.

Cold/Warm – When enabled, the Bloom/Glare effect will be toned to cold hues. When disabled, the effects will receive warm hue. The hue shift requires Saturation values larger than 0. See the Cold/Warm & Saturation examples below.

Interactive – When enabled, the bloom/glare effect will be automatically recalculated and applied after any V-Ray lens effects parameter change.

Update – Manually forces the recalculation of the bloom/glare effects.

 

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You can modify the frequency at which the lens effects are updated during progressive rendering via the Post effect rate parameter located in V-Ray's Settings > System rollout. Increase the value if you want to see the lens effects updated more often during Interactive rendering with V-Ray and V-Ray GPU. However, note that using large values is only useful in Interactive rendering and is not recommended for the final rendering.
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Streak blur = 0.0
Bloom (constant) = 0

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Streak blur = 0.1
Bloom (constant)= 0

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Streak blur = 0.2
Bloom (constant) = 0

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Streak blur = 0.3
Bloom (constant) = 0

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Streak blur = 0.4
Bloom (constant) = 0

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Streak blur = 0.5
Bloom (constant) = 0

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Streak blur = 0.6
Bloom (constant) = 0

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Streak blur = 0.7
Bloom (constant) = 0

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Streak blur = 0.8
Bloom (constant) = 0

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Streak blur = 0.9
Bloom (constant) = 0

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Streak blur = 1.0
Bloom (constant) = 0

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Lens Scratches

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Lens scratches – Enables the lens scratches effect.

Pattern – Specifies Random, Stripes, Square or Hexagonal type of pattern for the scratches.

Symmetric – When enabled creates symmetric pattern of the scratches. This option is available only when Pattern is Random.

Streaks – Specifies the number of streaks that are clustered together. If Symmetric is enabled, the streaks are stemming from one point with equal angles. If Symmetric is disabled, the streaks are scattered from random angles.

Density – Controls the density of the scratches effect in percent, where 100 is fully black.

Length – Controls the length of the scratches.

Slope variance – Randomizes the direction of the scratches.

Width variance – Randomizes the width of the scratches.

Seed – Specifies a seed parameter to introduce variance in the randomization.

Zoom – Controls the size of the pattern.

Rotation – Determines the position of the scratches by rotation.

Strength – Controls the strength of the effect.

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Lens Dust

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Lens dust – Enables the lens dust effect.

Pattern – Specifies the Random, Square or Hexagonal type of pattern for the dust.

Density – Controls the density of the dust effect in percent, where 100 is fully black.

Radius variance – Specifies a variance in the radii of the dust dots. A value of 0 makes the dust dots uniform.

Jitter – Controls randomization of the position of the dots.

Zoom –  Controls the size of the dust dots.

Rotation – Determines the position of the dust dots by rotation.

Strength – Controls the strength of the effect.

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Obstacle Image

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Obstacle image – When enabled an obstacle image can be specified. You can use it to simulate various effects on the camera lens. See how this changes the lens effects in the Obstacle Image example below.

Path – Loads an obstacle image.

Zoom – Controls the size of the obstacle image. 

Rotation – Rotates the obstacle image. 

Strength – Controls the strength of the effect.

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Enabling this rollout disables the controls for the generated filter:

Filter image – Enables a filter image from the Filter generator tool to be used.

Path – Specifies the path to a filter kernel.

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Aperture Preview

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The Aperture Preview panel is loaded by default, but can be minimized like the other Aperture groups. The aperture shape shows the result of the applied lens effects.

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File Names of Saved Channels

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As expected, channels will keep their names as displayed in the VFB when saving them to a single .vrimg or .exr file (using the Save all image channels to single file VFB button). The same channel names will be appended to the files when you use the VFB button Save all image channels to separate files.

 

 

Notes

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  • When using Deadline for network rendering in combination with V-Ray Lens Effects, make sure to disable the Local Rendering option when submitting to Deadline. Otherwise, Deadline is not able to save your bloom/glare effects.