I noticed the Terrace is the only UB based from the granary. I'm rather surprised there's no UB that's a granary that retains more than 50% food. What are people's thoughts on this? I think a Granary that retained 70% food after growth wouldn't be necessarily too strong compared to some of the other UBs. It'd rock for Slavery, but then you always have to deal with the chance of the slave revolt event...

Personally i do think retaining 70% would be quite a lot. Thats 40% faster growth, compared with the normal Granary. Through the course of a full game.
The better food->hammers converion ratio on whipping in addition would be only the icing on the cake - most of the time whipping is limited by the time requiered to get rid of the :mad: more than by the time requiered to regrow.

I would rather concider additional health bonus (direct or from ressurces) or perhaps a +1:food:

Have you any suggestion for a particular building/civ btw ?

For CIV Gold at one point I suggested a Granary that retains 60% food as a UB for one of the civs, although I don't remember which one.

- 70% is to much imo - that's a very fast grow for civilization - and it gives significant bonus from the begining of the game. - very powerfull bonus (right now grannary is one of the best buildings in the begining of the game.

70% was a "pulled from hat" number, but the consensus seems to be that increasing it at all from 50 would probably be too much.

Does anyone know, then (tested?) if having two buildings with granary-like properties stack together? Perhaps we could have a UB (barracks or supermarket...) that's an extra 10% so it's not so much bang for one building.

They stack..... just tested it

Most UB's that modify percentages only add about 10-15% (e.g. mint, stock market).