low quality image output

[Richard Alexander]

hi list,
I've seen a few other entries with a similar problem relating to jpeg
outputs...mine relates to jpeg, tif, png, bmp: when accessing a 800kbyte
aerial image (via world file & mapscript) the output image gets
reconstructed to a very "blocky" output with few colours - tried playing
around with imagemodes (e.g. MS_IMAGEMODE_RGB) but no improvement  - I've
noticed a difference  in rendering using a tif source, but it's not better,
just slightly different. thanks for any assistance.
(just as a check i've opened the same image using PIL on it's own and it's
up there with the best of them !)
cheers
Richard
UK