GR translation: screened more coarsely

[Mike Jing]

V307.34-308.1, P312.21-26   Marvy here by subterranean light is even
less engaging than he was in the moonlight on top of that boxcar. The
rolls of fat, bulging eyes and glistening teeth are grayer here,
screened more coarsely. A strip of adhesive tape plastered
athletically over the bridge of his nose, and a purple, yellow, and
green decoration around one eye testify to his rapid journey down the
railroad embankment the other night.

The word "screened" here refers to the halftone screening in printing,
is that correct?
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