A little practice with Escher

Here's a couple pieces I did this afternoon to play a little with 1/8" birch ply. I'd eventually like to do a bigger lizard tessalation. These are just test pieces. I find it hard to cut without significantly smoking the edges. These were cut at 60% speed, 100% power, 2 passes. The thin lines were 100% speed, 20% power. The Sky and Water engraving was at 100% speed and 50% power, 500x500.  Probably to much, I lost a little detail, maybe 30% next time.