How to put softly falling snow into an image.
1 Create a new layer
Bring up the layers palette (windows-layers) and
make a new blank layer. Next go to Edit -Fill and from the drop down
Use menu choose 50% grey. Click OK to fill the empty layer 1 with the
neutral grey colour.
2 Add noise
To make the snow go to filter -noise-add noise
and set Amount to about 140. Click both the Gaussian and monochromatic
boxes then OK. Next soften the noise effect by going to
Filter-Blur-Gaussian blur. Enter a radius of 5pixels and click OK. This
will create clumpy snow flakes.
3 Blend layers
Go to enhance-Adjust
(Image-Adjustments-Brightness/Contrast in Photoshop) and set Brightness
to -14 and contrast to + 91. At this stage you can't see the original
background image, but by clicking where it says Normal on the layers
palette the blending mode can be changed to Screen from the menu. The
image will then show through.
4 The final step. Add Motion Blur
To give the impression that the snow is falling
use the Motion Blur Filter. Go to Filter-Blur-motion Blur and to start
set Angle to -80 and Distance to 22. You can experiment with all these
figures to get the desired effect. When you are happy with the effect