OK...bit more detail on suggested method: create fountain fill in greyscale for your intended halftone area, convert to bitmap (may want to coulour mask/delete background at this stage>Image>Convert...
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OK...bit more detail on suggested method: create fountain fill in greyscale for your intended halftone area, convert to bitmap (may want to coulour mask/delete background at this stage>Image>Convert...
in X3/PhotoPaint, convert to B&W(1 bit) has settings that could help produce what you are looking for...