The top floor of the V & A is devoted to ceramics. Even on gray days the galleries are bright, thanks to the recently refurbished roof. There are places where you can look out over the roof. Hundreds of glass panes form a new topography of mountains and valleys. buttes and plains. This section first made me think of a race track, then one of those water parks with churned-up rapids in a faux stream. My mind wandered. The reflection of the museum's dome and greenery became rippling waves. I could almost see happy, wet people ensconced in inner tubes coming round the bend. Now that would be a sight, up on the roof of the V & A.