Quote - Yes, changing the pattern size is easy - there's a parameter for it. There are three actually.

Pattern Size = width of each pattern unit
Pattern Softness = alters the shape and overlap of the pattern units
Bump Value = depth (amount of displacement) of each pattern unit

Here I boosted the Pattern Size and Bump Value, and decreased the Pattern Softness.
 

Thanks for eating all my spare time this week, BB :0)  I'm fascinated with the reptile material, and have been applying it to way too many things (photos eventually).  I found "Pattern Size" (listed as "Pattern Scale"), and Bump's easily found - they are both on the first row as you laid them out.

I can't find "Pattern Softness" among the however many nodes on the Reptile Mat though.  Does it end up with another name in the latest version/update of Poser8?  Anyone find it?

But seriously.  Thank you ALL, and especially BBm for all the excellent stuff you share, even if I have to get my Mech. Engineer major son to explain some of the math.