Our image to gcode programs are for raster engraving only.
If your using inkscape to trace an image, you may need to increase the DPI of the image so it does not pixelate. A low DPI resolution causes a Dithered image to have jagged edges from pixelating also.
What inkscape Laser Plugin are you using? J-Tech? https://jtechphotonics.com/?page_id=2012#3
I only use a high end cad/cam program called KeyCreator for generating vector laser cutting gcode files. I can not make any recommendations because of my lack of experience using anything else.