Is there a way to force a SubD face to be perfectly planar (would require all associated vertices to be planar as a starting point), with all adjacent faces tangent at the edges?
Did you try vertically scaling (to zero) the face/vertices/edges?
Perfectly planar would require the edges to be creased as well.
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Hello- the control points for the face and all the immediate neighbors will need to be co-planar.
-Pascal
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Pascal’s answer is more in line with what I’m getting at. The control points of the subD surfaces I’ve made are not as easy to understand as shown in this image. Basically, I’m trying to make the midbody of a ship parallel between two loops. As you can see in this image, the midbody is not straight and the control points don’t make a lot of sense (at least to me).
@rhorsefield I have been wondering about something similar to that as well. In tSplines I could select the two faces in your image that start with 60 and 75 and the toggle the selection to vertices and run the command FlattenPoints to straighten out the two faces.
Might not be the accuracy you are after and more than likely not planar but it was great for tidying up organic shaped models. At present to straighten things up that do not align to a cPlane I need to create a custom CPlane and project to it. The tSplines command flattenPoints was much faster.
cheers,
Sochin
@sochin Try the Align command when you have a sub-object selection of several faces and there is an option for ToFitPlane that may be useful.
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Tried Align/ToPlane based on Brian’s comment. It appears to help, but surprisingly didn’t reposition all of the corners of the subD face I selected. Still, this is a good one!
I also found that EditPtOn, selecting curve segments and projecting them to the cplane helps quite a bit.
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@BrianJ and native subD just gets better and better for me 
Thank you Brian.
cheers,
Sochin
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