[Tilecache] Regarding getting 8-bit png from TileCache

[gautamvs]

Hi

My requirement is to get 8 bit png from Tilecache, Mapserver with AGG
support.
I have checked with mapserver(with AGG) the out put for 8 bit png is very
good for my application. But when I include mapserver layer in tilecache
config file, the out put image is of 24bit.
How to specify output image type (i.e. bit depth) in tilecache config ?

I am using  Tilecache-2.10, Mapserver 5.2.1, AGG 2.5, Python 2.4 on CentOS.

Thanks
Gautam 
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