Putting a screen to a tif

[pworlledge]

Need to put a screen pattern to a tiff image so I can set it next to an unscreened image to show a rosette pattern. Any way to do this?

[cari]

On A Grey Scale image:

Duplicate Gray Channel to have a second channel.
Set Colour in Channel options to Black

Go back to Layers palette and select Layer

Run Filter > Pixelate > Color Halftone
Set Max. Radius and Channel 1 and Channel 2angles.

Should work :-)