The comments for ot_index_box() in octree.c contain the following text:

*   PORTABILITY WARNING:  this function REQUIRES IEEE single precision
floating
*   point format to work.  This is true of most common systems except VAXen,
*   Crays, and Alpha AXP in VAX compatibility mode.  Local "float" variables
*   can NOT be made double precision "double" or "DBL".

-Nathan

Robert Alan Byer <bye### [at] mailourserversnet> wrote...
> I thought I had everything working in my POV-Ray v3.1g port for OpenVMS
> UNTIL I tried the radiosity demo scene.
>

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