Sebastian H. wrote:
> Great, reducing the warning level helps. Thank you very much.
> Now I redirect all message streams to separate files respectively.
> But the "lower max_gradient" messages definitely end up in the fatal
> message file. So are they warnings or fatals or may this even be a bug?

This is indeed a bug in POV-Ray 3.6. It turns out that all messages that 
report a filename/location _after_ parsing send their warnings to the error 
message queue rather than the warning message queue, and consequently they 
appear in the fatal/error stream rather than the warning stream where they 
should be. This only concerns warning messages reporting a filename/location 
_after_ parsing, which I think are (in 3.6) only isosurface max_gradient 
warnings.

> There's another curiosity. The first fatal message in the fatal message 
> file mentions a max_gradient of 10.850 found whereas the
> max_gradient should have had been set to 13.000. But the greatest 
> max_gradient value to be found set in the whole scene is 5.0.

The max_gradient found depends on the pixels traced. The same is true for 
the suggested max_gradient. It is only an estimate based on the pixels 
traced, and usually not the real maximum gradient of the isosurface. As 
such, it will be different if you trace different subsections of the same 
isosurface.

	Thorsten

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