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I have various images of shadows.

shadow

I need to round the opacity of all pixels that actually have a color, to either 0% or 100%, depending on their original opacity.

Here's all pixels below 25% opacity set to 0%, and the rest set to 100%:

enter image description here

Here's all pixels below 75% opacity set to 0%, and the rest set to 100%:

enter image description here

These bottom 2 images were created using an image effect in a video game engine. I need to re-create this effect ideally in Photoshop, but could probably get by in another image editor. These images are on a transparent background which I need to retain.

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1 Answer 1

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3

  1. Use the first image to create a layer mask on a black filled layer.

  2. Select the mask thumbnail in the layers panel.

  3. Do a Threshold adjustment, and move the slider as you like.

An example

enter image description here

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3
  • Layer > Transparency > Threshold alpha will work just as well in the simple cases.
    – xenoid
    Commented Nov 20, 2022 at 9:50
  • I'm not seeing a "Transparency" option under the "Layer" menu, is that the correct place?
    – Laserwolve
    Commented Nov 20, 2022 at 16:22
  • Yes, for Gimp see here
    – xenoid
    Commented Nov 20, 2022 at 18:42

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