Images in Line Mode

Still can’t figure out why when I try to burn an image like a bear on a tumbler, in line mode, it’s all screwed up. My settings are 160/25 which is fine for text material I type in. I can get the image to look fine in fill mode, but not line. Am I using the wrong layer color?

Layer color meaning Black, Blue, Pink, aqua, etc…? In preview it looks great, but on a tumbler, it looks like something that was just thrown up in the air, and just fell in random pieces…