Am 25.10.2011 21:51, schrieb H. Karsten:

> I'm wondering that your code did not find it's way into the regular PovRay! As
> well, I was asking for micro-poly-displacement in PovRay already long time ago,
> and nobody could get me some help..
>
> A lot of good Ideas are still not part of PovRay. Only available as patches.
> This is one of the most disadvantages of PovRay ever!

There are a few reasons contributing to this:

* Including a 3rd-party patch into POV-Ray proper requires the patch to 
be fairly stable, and play well with POV-Ray's traditional features. 
(MC-Pov, for instance, doesn't; for example you can't use both MC-Pov's 
features and conventional light sources at the same time, and MC-Pov's 
diffuse illumination gives significantly different results than 
radiosity due to an error in MC-Pov's math.)

* Including a 3rd-party patch into POV-Ray proper requires some member 
of the dev team to "adopt" the feature for future maintenance (or the 
3rd-party author to credibly commit themselves to future maintenance of 
the feature as part of POV-Ray proper).

* Including a 3rd-party patch into POV-Ray proper requires the patch to 
be compatible with the internal architecture of whatever POV-Ray version 
is currently "in the making"; this is especially a problem with the 
transition from 3.6 to 3.7, which not only changed major portions of the 
architecture, but also took quite a lot of time.

* Including a 3rd-party patch into POV-Ray proper requires the dev team 
to feel that the patch would make a good addition to POV-Ray's portfolio 
of features, without adding too much overhead in case the feature isn't 
used.

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