How can I get frame numbering to use leading zeros?
Also when i render to tiff, the images look upsidedown when oppend in
windows picture viewer or gimp, but they look fine in irfan view.

Thanks
andrew

for frame # padding try someImage.$F4.tif

as for the upsidedown thingy…they are not upsidedown…they are upsidedown and BACKWARDS!

from the Formats PDF;
BOTTOM-UP VS TOP-DOWN IMAGES
When images are stored as files, no assumption is made about whether images are
stored bottom-up or top-down. Images are simply a sequence of scan-lines. An
image is typically displayed using ip – the iplay program – which by default, displays
the image from bottom-up.
If you need to display images as top-down, use fip instead of ip . To set the default
behaviour as top-down, set the FLIP enviroment variable in your .login file:
setenv FLIP
Thereafter, these commands will display images as top-down instead of bottom-up:
icp myImage.tif ip
iplay myImage.tif

but to be honest I can't remember if I've tried this or not….