Effects

In the “Effects” panel, we have two categories: “Post-crop Vignetting” and “Grain”.
With the “Post-crop Vignetting” option, we fade or darken the edges of the picture.
We have seen in a previous lesson that you can do this in the “Lens Corrections” panel, but the right tools for this are found in the “Effects” window.
The reason is, when you apply this in the “Lens Correction” and then crop the picture, then the vignetting sometimes can happen in a different place.

This is not the case when you apply vignetting in the “Effects”.
When you use this window, it does not matter if you crop the photo, the vignetting is always in position. That is at the edge of the picture.

Below is a brief overview of the sliders:

• Amount
  Negative values make the edge of the image darker and positive values make the corners lighter.
• Midpoint
  At lower values, the amount of adjustment is applied to a larger area outside the corners. At higher values, the opposite.
• Roundness
  Lower values, make the effect of more oval vignette. At higher values, the vignette effect is rounder.
• Highlights
  At lower values, less softening is applied between the vignette and the surrounding pixels. At higher values, more softening is applied.

With the new “grain”, you can add film-like texture to photos.
In other words, you can simulate that effect a style reminiscent of certain film material.

• Amount
  Lets you determine the amount of grain that is applied to the image. Drag the slider to the right to increase the amount. Set to zero to grain off.
• Size
  Lets you determine the size of the particle of the grain. At a size of 25 or more, blue color is added to make the effect look better with noise reduction.
• Roughness
  Lets you determine the regularity of the grain. Drag the slider to the left to make more uniform grains or to the right to make the grains more uneven.

An example, slightly exaggerated, but it’s just that you can easily see.

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