There is a clear tendency that using one normal scaled very small with good
AA, is much faster than averaging a lot of textures. Sure, in theory, the
opposite is true. The micro-normal method isn't efficent because of the AA
that covers the entire scene, but nevertheless, in all my scenes it IS the
fastest method - by far!

The result is a little grainy, assuming you use only +r2  (which is 25
samples pr pixel)  but this may not bother anyone. By using the other method
(averaging textures) there is a price to pay as well: It can produce very
inaccurate results, at least when the normals have random directions and you
don't average all 255 possible textures.

Severi:  Use the method you think is best, and fastest.

Try this pov file that illustrates what I mean:
http://news.povray.org/povray.binaries.scene-files/29562/

Regards,
Hugo

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