Wavy Edge Siding

[05uurx]

I think i've seen a thread or two on this topic, but...i wasnt able to find one with a solution that made sense to me...

I'd like to create a "wavy edge" siding type for a drawing that i'm working on. I'm not going to be doing any renders, only C.Ds So, all i really need is a pattern. So here are my questions...

Is there a way to create your own custom patterns for siding types, with or without a texture (or using a default texture)?

I attempted to use the "Wood A" custom pattern for my wall, but...it is vertically oriented and i cannot figure out how to rotate this (i'm not convinced that i understand what these wood "entries" are used for in the pattern definition dbx)...but if i can rotate it, it will be fine for my wall...(see attached images)

Any suggestions?

Thanks