Here is the reference to the old 256 limit in v3.6

https://www.povray.org/documentation/view/3.6.1/510/
STRING_LITERAL STRING_LITERAL:
    "up to 256 ASCII characters"


And the link to the updated 3.8 version:
http://wiki.povray.org/content/Reference:Strings#String_Functions
STRING:
  STRING_FUNCTION   |
  STRING_IDENTIFIER |
  STRING_LITERAL STRING_LITERAL:
  "up to 256 ASCII characters"

I propose to use as many concat() as necessary, if that was the problem.


By the way, has anyone managed to write unicode characters (\unnnn) above the
ascii 128 limit to a text file? I would like to play with the rest of the ascii
characters but I only get blank spaces; Yes, I have already tried utf-8 in
general settings, but I do not intend to generate a text object in an image
using a truetype font or an ANSI extended font, but a separate plain text file
whose content is dumped by
Pov-Ray.

Regards
BGimeno

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