Sky Stars in 5 min
Sometimes I use different backgrounds in my photos. So, there was a situation I was need a good (high quality) stars texture. Here is my tutorial how to create it in 5 min. Step by step:
So, we will start with a new document (let say 800×600 72 dpi). This image is small, you will need much bigger for photos, but this is only tutorial.
Ok, fill your new image with the black color and reset your foreground and background colors to black and white [ D ]
Go to Filter->Noise->Add Noise. In this dialog set up noise amount as 10, Distribution as Gaussian and enable Monochromatic checkbox.
You will need to play with noise amount for bigeer images (when you work with hight quality photo).
Press OK. This will add some white noise to your black image. Now go to Image->Adjustments->Brightness/Contrast. In this dialog set Brightness to -40 and contrast to 90. Press OK. This operation creates a nice looking stars, BUT the real sky has many bigger, smaller, brighter stars.
Copy this layer to create a new one (layer via copy). Now go to Filter->Blur->Gaussian Blur. Set up blur Radius as 1. Press OK. Go to Image->Adjustments->Brightness/Contrast and set Brightness to -20 and contrast to 90. Press OK.
Now you will need to leave only light places from this layer. So, set Blending mode of layer to Lighten. This willshow you all your stars from your background layer AND stars from new layer.
Again, create a copy of the top layer (layer via copy and now we have 3 layers). Again Filter->Blur->Gaussian Blur and set up Radius to 3. Go to Image->Adjustments->Brightness/Contrast and set Brightness to -5 and contrast to 90.
Here is your sky. Finnaly 3 layers where last two Blending mode should be Lighten.
I attach the action which will create a new 800×600 image and follow all the steps we discussed. Stars Action