Am 25.04.2018 um 03:24 schrieb green:

> This unofficial POV-Ray  binary was built without support for the OpenEXR file
> format.  You must either  use an official POV-Ray binary or recompile the
> POV-Ray sources on a system  providing you with the OpenEXR library to make use
> of this facility.
...

> this is ubuntu 16.04  kernel 4.4.108, the following libraries are installed;
>    libopenexr-dev
>    libopenexr22
>    openexr
> and associated
>    libilmbase-dev
>    libilmbase12
> all of these are version 2.2.0-10ubuntu2

Apparently POV-Ray's `./configure` script fails to locate the libraries
on your machine (or finds them dysfunctional), for reasons unknown. This
seems to be pretty rare, given that you're the first to report such an
issue.

Maybe your `./config.log` might give some clue.

When the build process can't locate the OpenEXR and/or IlmImf libraries,
it will simply disable OpenEXR support and build without the libraries.


This differs significantly from the build process on Windows machines:
While on Unix machines it is normally a piece of cake to get 3rd party
libraries installed and working, on Windows machines it is normally a
PITA, so the POV-Ray source package (and the UberPOV source package
likewise) comes with the source code of a particular version of the
libraries, which are compiled during the POV-Ray build process and
statically linked.

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