Make a mouse click on the same layer on the layers panel, choosing Drop Shadow option and then select Create layer option. The shadow will be represented on a separate layer.

Create a new layer that will be situated above the shadow’s layer (on the layers’ panel). After that, select the Paint Bucket Tool (G) to paint it in white color. Press CTRL button to mark out the shadow’s layers and the white one, merging them together (CTRL+E). Apply for the merged layers a new option: Filter>Pixelate>Color Halftone

Mark out the white background, using Magic Wand Tool (W) and press Delete button.

Now we shall choose Lock transparent pixels option by making a mouse click on the same layer we work with on the layers’ panel.

Select a standard brush to paint the shadow with the color #334110

Get back to the star’s layer:

The layer’s parameters: Blending Options>Drop Shadow