The texture is emphasised by adjusting the relative frequencies controlling the figures to ensure that the underlying wave motif produces just about visible separate on lines.
Unfortunately, in a few of the images this is probably not apparent in the slightly reduced resolution images that emerge through the Content Management System's software pipeline - even though full resolution images were uploaded. (They were originally constructed for viewing on a 1920x1200 pixel monitor.) I may have to look at changing some of the modules that handle images for better results - though at the cost of higher bandwidth.
I fact, I would really like to move to higher resolution hardware on the production end, but I would not be able to display the generated images on the web in anything like the amount of detail I might wish.