Aside from making changes in a graphics program (e.g. Photoshop) I tend to save out my images with a pixel size that would support up to a 10" burn at 318 DPI (3180 on the long edge). This allows me to scale down for smaller burns (4x6, 5x7, etc.) and LightBurn seems to do a great job of resampling. Has anyone else taken this approach?
You are externally preparing your artwork to handle how the ‘dither’ is applied.
Have you set the layer to Pass-Though ?
This tells Lightburn not to apply anything to it and just pass the data to the laser. I think this is what the issue could be…
Keep in mind your physical limits with the machine.
Hope this helps…
Good luck… be looking forward to seeing your work
LightBurn resamples the image to produce square pixels based on the scan interval:
In that case, I wanted specific pixel densities along the X axis to check the power supply response, but discovered the Y axis scan interval controlled the result along X.
So I think it’s better (*) to manually set specific image dimensions and resolution to match each engraving job, rather than pass an oversized image to LightBurn and have it do something before sending it out to the laser.
I don’t know how that apples to a grayscale image where LightBurn chews the pixels into a dither pattern, but some experimentation would definitely be in order.
(*) In the sense of “I care enough to fiddle with this image and don’t want anything else messing with it.”
Pixel size is not the same as dpi
I should’ve stated that differently. I’m referring the number of pixels on the long edge of the image. You could import an image that is 6000 pixels along the longest edge and shrink the picture to a 5x7 using 318 DPI in LB for dithering. LB will resample the image to 2226 pixels (318 x 7) and then apply whichever dithering method you selected.
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