I generated a test gray-level image with hf_gray_16. This created a "image.bmp" file.
The
documentation says that this is a "special 16 bit grayscale". I looked into this file
and it seems
to be really an 8-bit file with all of the r-g-b values equal for each pixel. Is that
indeed the
format of these files? I want to write some c++ code to generate these height field
files that
povray can use.

thanks,
Ralph

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