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I want to create a background like this:enter image description here

But gets like this (notice the spots and trails): enter image description here

I tried with different color modes/bits per channel. It's always like that. What I'm doing wrong?

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up vote 1 down vote accepted

This is what I got:

enter image description here

  1. Press X to set colors to black & white
  2. Filter -> Render -> Clouds
  3. Create a Levels adjustment layer, and move the slider to the right to increase contrast.
  4. Select the Levels adjustment layer, and press CTRL+E to apply to the background layer
  5. Filter -> Blur -> Gaussian Blur, and move it right until you reach the desired blurriness.

Hope it helps!

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How to create levels layer style? – blez Sep 9 '11 at 13:27
Sorry, it was an adjustment layer. Layer -> New Adjustment Layer -> Levels – Veehmot Sep 9 '11 at 14:51

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