Not the image exported from gimp, the untouched original source file.
- Import an image, and select it
- In the Shape Properties window, set the “Gamma” value to 0.65
- You may also wish to adjust Brightness and Contrast, depending on the image, but leave that for now
- Set the DPI to 254, speed to
120mm/secmatch your hardware, and choose Jarvis dither
Run that, and compare the output with what you get from Da Script.
Did you try this? What is the result you are seeing?