First of all, I spent all day today looking though this post and I find it awesome, so much useful information.
Although I came with a question (here is so much information, that I don't remember, was it posted or not).
In the pictures 1-3 i try to make a hole, I used a 12 angle(verts) circle to make it, but as you can see I can't figure out how to make it work all in quads.
I made it with 12 verts with a reason, because I will create a normal map from this model and then apply it to the low poly, but I want the low poly to have the real hole in the mesh, not only a normal map effect.
In image 4 you can see, that I used 8 verts circle. I suppose this is the right way to do it, but the question is.
When I will bake a normal map (in 3dsmax) will it be round? Is it enough geo for the circle to be round in low poly? I don't like the corner sharpness.
I had some previous experience, that it won't be.
Please anyone, tell me the right way to do it.