Engraving on Acrylic

Hell.My wife try yesterday to engrave photo and appeared some verical lines.When I tried two times before pictures were really good with some basic settings like 17 power,200 speed,318 DPI and scan interval 0.08.Yesterday she try with these setting and little bit adjustment on shape prolerties .She put Enhance radius 20 and Enhance amount 200 and Enhance denoise 0.Can somebody tell me is thrre any good video or instruction with explanation about setting for engraving.We are new in this softwere we were using RD software.My machine is PLX 6090 100w and 2 inch laser

Here is a video that may point you in the right direction, This fellow acctualy has quite a few good Lightburn tutorials.