Christoph Hormann <chr### [at] gmxde> wrote:
> How about:
> [...]
> Also note you don't need to use a paletted image for this - grayscale
> will work fine as well (even 16 bit).

Many thanks, Christoph, that works very well! This solution cuts about 40%
off the parsing time relative to the material_map approach, which is
plenty.

Tom

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