Red = straight line segments (G1 moves: see G Codes) Blue = Arcs (G2/G3 Moves: see G Codes ) and Green = linear seek moves (G0 moves see G Codes) That top section is a proper arc (section of a circle) so your CAM software made that segment a G2/3 ARC move (more efficient) The rest of the shape is not a proper arc, so instead it's a Polyline, exported as interpolated G1 moves (totally fine!) You may also some yellowish lines top-right of your job. Thats when a green and red line run in the same place (probably RED G1 move to plunge down, and a Green G0 move to retract out of at at the end of the cut) - as they are in the same space the red and green kinda mixes together when rendered and looks yellow
I understand, thank you for your reply. I still have a question about milling settings, in Fusion 360 I have left all the time, set it to tests right once. Will this help minimize hail in the tree, because I have to clean a lot after milling to smooth it out.
Not sure I completely understand your question (language barrier, sorry) but "hail in the tree" do you mean bad surface finish on the wood? and "I have left all the time, set it to tests right once." - are you referring to CLIMB vs CONVENTIONAL?