Le 14/04/2012 09:06, Thomas de Groot nous fit lire :
> On 14-4-2012 0:11, Alain wrote:
>> As of version 3.6 onward, +bxxx (Output File Buffer) is useless and
>> silently ignored.
>>
> Now that you mention this, since version 3.7 I have been using +bm2 in
> my ini out of habit. However, I am unable to find any reference to it in
> the docs and I don't remember its purpose. I am feeling a bit stupid
> now... :-)

BM is bounding method (1 or 2, but can be disabled with -B )
Default is 1 (traditional bounding box).
Method 2 is using a BSP Tree (binary space partition tree)

Some pathological scenes get benefit from method 2... or detriment.

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