How to gradually adjust Brightness Filter?

I'm trying to get a group of objects to darken when they pass a certain part of the sun, but I can't adjust a fade in with the brightness filter. How can I have a nice transition between the original brightness and the altered one?

Move the playhead to the frame you want the brightness to start decreasing.
In the Filters inspector (with the object of filter selected) click where you see the yellow "diamond" shape (that will set the first keyframe.) (When you mouse over that parameter, you'll see a light gray version of the icon appear -- and once you set one keyframe, then some variation of that icon will persist there; if it's gray, there's no keyframe at that time -- the < and > marks appear when there are set keyframes before and/or after the current time -- you can click on them to advance the playhead to the exact time of the previous/next set keyframe.)
Move the playhead to the end of the brightness range and drag the slider to zero.
Assuming you want the "other side" of the orbit to go back to the original brightness, move the playhead forward to the point where you want the maximum brightness restored and move the brightness slider back up to the setting you require.
Notice you only had to "set" the first keyframe. Motion automatically tracks changes on parameters with any keyframe on it and will automatically apply a new keyframe at the playhead time position IF you change the value of the parameter.

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Hi, Guys.
I could really do with your help.
I shot a scene in low light conditions so the image is fairly grainy anyway (I shot the scene on an Sony PMW EX3).
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Does anyone know what I mean and does anyone know how I could adjust the brightness without increasing the size of the grain (without losing quality and color).
Cheers guys.
H

Yes Tom, the reverse ... but steady as she goes going in the opposite direction. You might want to explore some possible denoise options too if the grain is really too distracting.
Take a look at Mattias Sandström's Smart Noise Reduction filter which is part of his completely free and completely awesome Too Much Too Soon filter set: http://www.mattias.nu/plugins/
On the commercial side there is the highly recommended Neat Video plugin: http://www.neatvideo.com
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How to gradually adjust Brightness Filter?

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