Mapmaking tips.

Technical bugs or errors in rendering, or imbalances, usually indicate that the map creator did not test it, or did not put enough effort into it.

I simply can't understand this. Creating a good map requires dozens, or even hundreds, of hours of work. How can it be so difficult to spend a couple of days testing it? I remember a few years ago, I was playing through the "Adventures of Might and Magic" campaign. In the second scenario, I couldn't get past a checkpoint, even though I had the required artifact mentioned in the message. It turned out that the author simply forgot to set the quest condition, and I had to replay the entire first scenario and half of the second.