I attended a ketivat ot (writing a letter in a Torah) last night. The entire Torah had been written, but many letters had outlines. The person "writing" the letters filled in the outlines.
I understand the practicality of this, as most people are not skilled in writing letters properly, and the letters need to be written sequentially. However, I'm curious about the actual halacha in terms of outlining.
In other words, does the halachic requirement of writing sequentially mean that just the outlines of the letters need to be written sequentially, and the filling in of the letters can be done non-sequentially?
Is filling in the outline considered, halachically, as if you are making a correction? If it is that, isn't there a halacha that one may not correct G-d's name, and therefore, any letter of G-d's name can not be filled in?