Try burning something like this in a grid instead:

If that comes out “true” - as in, shaded from black to white, with a smooth transition, you’ve got the settings right. Image burning is different than just burning a filled shape.
Try burning something like this in a grid instead:

If that comes out “true” - as in, shaded from black to white, with a smooth transition, you’ve got the settings right. Image burning is different than just burning a filled shape.