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Minimum line width (px) for image import to take into account?

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Due to fan breakdown I'm currently using my printer as pen plotter. I've already switched from gcodetools to Cura as my image to gcode converter, yet I'm having a huge issue - looks like Cura's jpg to stl converter doesn't detect lines thinner than 3px, what usually results in lack of contour or dot spam, both breaking the output print. Of course I can enlarge the lines at the image editing stage, but this makes all lines thicker, what blurs most of details.


Is there any way to decrease minimum requied line width (even if it means editing source code)?


Cura 2.7 on W10 (because 3.2 crashes when slicing output stl).

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