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This page contains information about V-Ray's standalone Lens Effects Filter Generator.
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Overview
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The Filter Generator is a tool to create HDR filter kernels for use in the V-Ray Frame Buffer Lens Effects' Glare Image parameter.
The V-Ray Lens Effects Filter Generator is based largely on the model presented in Physically-Based Glare Effects for Digital Images [ 1 ]. For a complete list of references, please see the References and links Links section.
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File Options |
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The file menu shows options for saving and loading presets and exporting the final filter kernel. |
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Radial Symmetric Pattern Parameters |
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The Radial Symmetric Pattern parameters control the scale of the overall Lens Filter. Shape – Adjusts the size of the pattern. |
Corona Flare Lines Pattern Parameters |
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The Corona Flare Pattern parameters control the amount of rays emanating from the light source |
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. Diametric – When enabled, mirrors the pattern across the center. Radius – Controls the size of the pattern radius. Number Of Lines – Controls the number of lines in the pattern. |
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Special Flare Lines Pattern Parameters |
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The Special Flare Pattern parameters control the pattern of the Special Flares Lines. Ray Pattern Dropdown – Determines the number of Ray groups. Radius – Scale of the Special Flares Lines Lens kernel in Percent. Number of Lines – Determines the amount of lines used in each ray pattern. Range – Controls the spread of the Ray Pattern. Rotation – Rotates the entire Special Flare Lines Pattern in degrees. |
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Lenticular Halo Parameters |
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The Lenticular Halo parameters control the bounds of the halo. Inner Radius – Sets the inner bounds of the Lenticular Halo Outer Radius – Sets the outer bounds of the Lenticular Halo. |
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Mix Parameters |
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The Mix parameters control how the Lens Parameters mix together into the final Filter kernel. Pattern 1 – Sets the percentage Radial Symmetric Pattern 1 is mixed with the final Filter kernel. Pattern 2 |
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– Sets the percentage Radial Symmetric Pattern 2 is mixed with the final Filter kernel. Halo – Sets the percentage the Lenticular Halo has on the final Filter kernel. Aspect – Determines the Aspect Ratio of the final Filter kernel. Apply Corona Flare Pattern – Enables kernel filtering |
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with the Corona Flare Pattern. Apply Special Flare Pattern |
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– Enables kernel filtering with the Special Flare Pattern. |
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References and
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Links
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Here is a list of links and references about the V-Ray Sun and Sky implementation, as well as general information about the illumination of the Sun.
[1] G. Spencer, P. Shirley, K. Zimmerman, D.P. Greenberg Physically-Based Glare Effects for Digital Images.;
An online version can be found at http://luthuli.cs.uiuc.edu/~daf/courses/rendering/papers3/spencer95.pdf
This pape paper is the base for the Vthe V-Ray Lens Effects Filter Generator.
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