Not sure it can be interesting, but I like it. So, look at this quite simple texture. 

====== cut from here =========
plane{z,5.5
 texture{pigment{gradient x pigment_map{
  [0.49, checker color rgb 1 color rgb 0.5 scale 0.5]
  [0.49, checker color rgb 1 color rgb 0.5 scale 0.5 rotate z*45 scale sqrt(2)
translate -y*.25]
  }}
  finish{ambient 1 diffuse 0}
  }
 }
========= to here ===========

I'll be glad to read some comments.

Sincerely yours,
Alex Kluchikov

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