I've made a couple previous runs at using the relatively new tiling 
patterns finding some things working and others not. Today finally 
figured out the tiling pattern requires 7 significant digits in the map 
file used with the pattern when into values like 0.316666...

The scenes/textures/patterns/tiling.pov example writes only 4 
significant digits & I was using that code to create my maps.

I'd suggest updating the tiling example to write 7 significant digits  & 
perhaps a note about this should made in the documentation too. Tiling 
23,3 is an example with the issue should folks want to verify.

Not really sure why more accuracy is required. It only affects parts of 
some tiles within any given tiling pattern with the issue.

Bill P.

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