Adobe material advice

[Sawyer]

I have a new project and the architect wants to show an exposed adobe wall. I am trying to set up the material for this and it is not coming out right. The main face of the bldg will be 180' long and I haven't been able to find maps that won't look really tiled over that distance. Brick procedural map is too square and ridged.

 

http://www.grandriverhomes.com/photolib/index.aspx?T=Adobe%20Veneer&L=Adobe.htm

 

 

That site has some of the look we want. Really it would just be a veneer like that. Image 6 shows it the best, large gaps & rounded bricks.

 

Only thing I can think of is to go to Photoshop & create a wavy rounded brick bump map. Is this the best way?

 

Thanks for the help.