We do have a Moire Eraser plugin filter for the Mac versions of Photoshop. This is not a 100% perfect filter but it will do a pretty good job on darker materials. If you have light fabrics with moire patterns, then there could be some bands left over in the Luminance channel. Some people refer to these as Zebra stripes.
Moire Eraser works on RGB color, 8 bits per channel images. You will need to use the Lasso tool in Photoshop to make a selection of fabric with the moire patterns. Next select Moire Eraser from the Camera Bits option in the Filters menu. Moire Eraser will determine the median color of the selected area and use that for the replacement color for the moire bands. Use the Amount slider until you have replaced all of the orange and blue bands with the median color. Click the mouse in the preview window to see the before and after look. Hold the mouse button down for the before look. Release it for the after filter look.
White lace fabric is just about impossible to remove all of the moire bands. There always seems to be some Zebra stripes left over in the Luminance channel. Using the Smart blur filter in Photoshop can hide these bands at the expense of the fabric detail.
You might consider bracketing your camera's distance from the subject. Moire Only occurs when the pattern of the fabric coinsides with some multiple of the CCD pixel spacing. If you get Moire at 5 feet away from the subject, then try 4.5' and 5.5'. The more shots you take at different focal lengths or distances, the better chance you will have of getting an image with hardly any or no moire at all.
Moire Erase is installed when you install Quantum Mechanic Pro. If you have Photoshop 7 or older, then you can go to our webesite and download the Quantum Mechanic installer posted on the Downloads page. If you have PS CS or CS2, then you should use the newset versions, v2.5.3 ( not yet posted on our website )
To get the latest Quantum Mechanic Pro / Moire Eraser version, just send an email to firstname.lastname@example.org
. I'll send the plugins and the instructions to manually install them into Photoshop's Filters folder. I hope this helps.