"Xplo Eristotle" ha scritto 
: // Test scene demonstrating apparent improper normal averaging.
: 
: #version unofficial MegaPov 1.0;

...

: sphere
: {
: <2, 1, 0> 1
: normal
: {
: average
: normal_map
: {
: [ granite 1 scale 1 ]
: [ granite -1 scale 1 ]
: }
: }
: finish { specular 1 }
: }
: 

What does the fine manual say about normal_map? (6.7.2.2)
I'm talking of POV-Ray's manual ...


BTW I think Warp is correct, if you want that someone opens a debugger
and starts a debug session in search of a possible uninitialized variable, 
or an overflow/underflow, a typo... whatever it is. 
I think it is very kind of you to remove *ALL* parts surely not 
responsible of the wrong behaviour and then read the manual to be sure 
that what's left is correct.

Massimo

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