Some recommendations for optimal use of action:
- Use a good quality pictures. I recommend using a photo with a resolution 500-6000 pixels on one axis for best effect.

ATTENTION!!! BEFORE USE DO THIS OPERATIONS!!!

1. Make sure you are using the ENGLISH version of Photoshop;

2. Go to: Image / Mode and check the "RGB color" and "8 Bits/Channel";

3. (Just for CS6 and higher versions) Click on menu icon at the right on "LAYERS" panel and go to "Panel Option...",
and check the "Add "copy" to Copied Layers and Groups".

HOW TO USE ACTION?

1. Open your image;

2. Open "Let it snow! - Patterns

3. Open the actions (for that go to: Window / Actions, click on menu icon at the right and choose in list "Load Actions..."
then find the actions on your computer and open it;

4. Find "Let it snow! - Action" on the action list then open it

5. Select the action appropriate to the size of your image and click play;

6. Wait a few second that Photoshop make all actions (speed of action work depends of the power of your computer);

7. If necessary, use a soft brush paint the excess snow on layers-masks;

8. Ready! just save.

Thanks