Variable deadrise

Tom,
What I am doing doesn't seem too different than what you are doing. I don't use the keel line as my frame of reference; instead more of a proposed at-rest waterline. Compared to the keel, I am bringing the chine down as you do, but compared to an at-rest waterline, I am bringing the keel up to reduce deadrise. What Mr. Efficiency does is different, but I wouldn't call it strange. (I figured what I was doing was strange.) I understand his approach; I think I have seen that approach on other boats; and it's working for him.

Mr. Efficiency,
Your latest diagram essentially describes my approach correctly. And I understood your approach from your previous diagram. Each approach may have its advantages, depending on the particulars of the boat and what one wants to achieve. I am pleased to have been introduced to an alternate method.

I am familiar with the concept of concept of "warped plane" but have never received an exact definition so I don't know if it applies to me. I prefer the mathematical exactness of what can be achieved in a developable surface.