QUOTE(MJL @ May 13 2009, 12:40 PM)

Gene prefers to render to AVI for posting to u-tube. He sent me the AVI and I used "AVS Video Converter 6"
to convert it to QT format, then sent it back to him. I don't know why but the QT vid played a little darker than the AVI for me on my computer as well. I believe Gene is experimenting with lighting as we speak. I also noted that the file size is quite different. AVI> 14.3 Megs, QT>2.04 Megs
I am not familiar with AVS Video Converter - so you might examine the settings you are using with it to do the conversion/compression and experiment with those. I don't know what settings you have available.
The difference in file sizes is due to the fact that the avi (which came from A:M) is probably uncompressed. Or it could have been compressed some. The smaller QT file size is because it was definitely compressed in AVS.
When one does compression - which is a necessary evil - there is usually degradation in the resultant imagery. This is a fact of life. Some compression methods work better than others for different kinds of imagery, and how much the imagery changes from frame to frame. I use mpeg4 compression, others like h264 for QT. When I now think about it, it is of course possible that the compression made it darker.
One has to play with the compression settings and make compromises between file size, and quality.
A good way to play with different compression methods is to render from A:M uncompressed (either to a tga sequence, or QT mov, or avi) and then experiment in your compression program. I use QT pro - only because I have it and it's relatively simple.