should note that I meant "pass depth" in the above and not path depth.
Worth noting that max depth determines how far in the bit will cut, you could set 12" in tool settings and it would still only cut as far as max ... Thats why I said "equal or greater", either will do the trick. But anything less than equal will require multiple passes.
Sometimes there is a legit reason for multiple passes, when the image starts deep I have cracked corian before - On the very 1st line the stress is the greatest between tool and material, it is cutting 100% into the material, after than only partially.
could do a roughing or use multiple finish passes but there is an easier and less time consuming work around - Use line angle 45, this will start the run in a corner instead of a straight line, very gradually working the tool into the project.