Still to do: articulate the columns and arches, fill in the ceiling
somehow, and maybe put in a brick wall (pierced by windows).

(Then I mean to taper the whole thing, which will mean throwing away
most of the work.)

I am far from sure what shape the ceiling ought to have (if not a simple
helicoid).  Perhaps I'll make the core hollow, with another arcade to
match the outside; then the ceiling will be groin vaults.

The angle of each `bay' is half a radian.  My little joke.

-- 
Anton Sherwood, http://www.ogre.nu/

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