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Click
Create Shooting
to open the Shooting Definition dialog box then select the
Effects tab:
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Click Active to activate the glow
effect as well as the fields and sliders displayed below:
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Use the Threshold box to define which pixel
intensities are considered as high and thus, processed for glow effect.
If one of the three primary colors (Red, Green,
Blue) composing the overall color of the light source is higher or
equal to the defined threshold, the light intensity is considered
as a high intensity.
You can enter a value comprised between 0.5 and 4
but a "good" value would be equal to or greater than 1. |
You must
carefully define the threshold and try not to set a too high value
because the more processed pixels, the higher the price to pay in
performance.
If you are not satisfied with the result, we recommend that you
access the light properties in order to check (and modify, if
necessary) the light intensity. |
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The Intensity box determines how
bright the glow effect shows. The lower the value, the less saturated the
image and thus, the darker the glow:
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Note that this parameter
has no impact on processing time. |
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Use the Size slider to specify
the size of the glow. This parameter directly affects the size of the
filter applied onto the image.
You can enter values
comprised between 0 and 1. The two images below illustrate this
(both with an intensity set to 1): |
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Bear in mind that a very big size can dramatically
increase the processing time. |
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Use the
Flare Intensity slider to make the flare more or less visible
to create a halo type image. The flare is the colored irisation
that appears in a corona around the light source.
In order to be as close to reality as
possible, it is recommended to set a relatively low value since the
flare is usually hardly perceptible, and sometimes invisible. |
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The
Flare Diffusion box is used to set the width of the flare corona.
The higher the value, the wider the circle bands.
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The Radial line
size slider lets you define the size of the streaks.
Setting this parameter to 1 means that the size of
the radial lines matches the size of the glow. |
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The Star
Effect slider lets you define the length and arrangement of the
streaks more or less at random.
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The lower the value, the
more aleatory the streaks. |
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Click
OK to validate then render your shooting by clicking
Render Shooting
(you can also right-click the Shooting item in the specification tree
then select Render Single Frame).
The
rendering time is totally independent from the model complexity
since the post-processing depends only on the threshold you
defined. |
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