I tried it.  Wow.  Chris is good.  (I'm sure he knows that, and I'm sure
you all know that, too.)  Here's my stats for a traffic_spacing=4,
traffic_lanes=2, and a 15x13 city area.
I've got a PII 266, 64mb ram.
<begin messages spam>
Scene contains 140406 frame level objects; 1 infinite.

C:\Program Files\POV-Ray\scenes\citytest-2.pov Statistics, Resolution
320 x 240
----------------------------------------------------------------------------

Pixels:           76800   Samples:           76800   Smpls/Pxl: 1.00
Rays:            105151   Saved:                 1   Max Level: 5/5
----------------------------------------------------------------------------

Ray->Shape Intersection          Tests       Succeeded  Percentage
----------------------------------------------------------------------------

Box                             772504          367073     47.52
Cone/Cylinder                   159135           19619     12.33
CSG Intersection                259172           63596     24.54
Plane                           233610          131061     56.10
Sphere                            3773             883     23.40
Superellipsoid                   12242            4947     40.41
Torus                             3502             944     26.96
Torus Bound                       3502            1095     31.27
Clipping Object                  32240           30285     93.94
Bounding Box                   5873005         1943312     33.09
Light Buffer                  15535096         5181254     33.35
Vista Buffer                   5484624         3767134     68.69
----------------------------------------------------------------------------

Roots tested:                 1095   eliminated:                 169
Calls to Noise:             579544   Calls to DNoise:         182908
----------------------------------------------------------------------------

Shadow Ray Tests:           179227   Succeeded:                73514
Reflected Rays:               8794   Total Internal:             627
Refracted Rays:               3082
Transmitted Rays:            16475
----------------------------------------------------------------------------

Smallest Alloc:                 26 bytes   Largest:          1123264
Peak memory used:        116463857 bytes
----------------------------------------------------------------------------

Time For Parse:    0 hours 48 minutes  58.0 seconds (2938 seconds)
Time For Trace:    0 hours  5 minutes  16.0 seconds (316 seconds)
    Total Time:    0 hours 54 minutes  14.0 seconds (3254 seconds)
All I've got to say is... wow.  I brought the thing to a dead stop 4
times, cause my swap was too small.  I only ended up with a 6x6 overhead
view of the city... but it looks great.  The cars, the streetlights...
wow.
And thanks for the tip, Ken.  Never would have checked Edit menu.
Mike

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