This month's puzzler comes from Matthew. Reply in the comments with your answers. The first to answer correctly will win a 5lb spool of PLA!
"The other day I was preparing a print that required dense infill on the bottom of the part and then sparse infill for the rest of the build. I thought I was being pretty smart and using the advanced options in Simplify3D to create two processes. When I prepared the toolpath it revealed a strange layer as seen in the photo above. This was more than an abnormality on my computer screen, it actually left a visible mark on the print. Name the two settings in Simplify3D that can cause this abnormal layer."
Good luck everyone!